Gasket Kit for C-360

Product No. PR11942-01


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This gasket kit for the C-360 ONLY fits the C-360.

If you are looking for the Magniflow 360 Gasket Kit, check this link.

Gasket Kit for C-360 is rated 4.2 out of 5 by 58.
Rated 3 out of 5 by from Product was great! Shipping was to expensive Great parts for my filter but the shipping was way to much money.
Date published: 2016-11-16
Rated 5 out of 5 by from Just what I needed. Bought this for my filter a month ago and it is exactly the parts I needed. No more leaking. Great quality. Will purchase from here again in the future. Thank you marineland!
Date published: 2016-08-22
Rated 5 out of 5 by from Filter leak stopped My large canister filter was leaking, so i ordered a gasket kit and all the parts fit exactly in place and my leak stopped. Low price for a big fix.
Date published: 2016-06-28
Rated 5 out of 5 by from Problem Solved I bought this item for my 4.5 year old pump that has recently begun leaking.Solved the problem!Karen
Date published: 2016-05-31
Rated 4 out of 5 by from Thankful customer..... We bought some O-rings to fix our canister filter. We have a Marineland 360. It began leaking from, what looked like, under one of the clasps. The O-ring did the job. We're thankful.
Date published: 2016-05-08
Rated 5 out of 5 by from Customer Service C-360 Started leaking. Only had for a year. Called and they sent a gasket replacement no questions asked. Called on Monday here on Thursday. Replaced gaskets and the leaking stopped. Excellent Service. Would definitely recommend their products.
Date published: 2016-04-29
Rated 5 out of 5 by from Lifesaver! Great to have on hand when we lose one....Always arrives quickly!
Date published: 2016-04-25
Rated 1 out of 5 by from Leaks! I bought the c-160 brand new. A few months later it started to leak so I sent it in and exchanged it. Few months later the new one started leaking. Same thing sent it back and even upgraded to the c-360. About 8 months after that it started leaking again. So I'm buying the replacement gaskets and if that doesn't work, I'm done! Too bad cause, when it works, it's a beast!
Date published: 2016-03-08
Rated 2 out of 5 by from product does not last long enough I have three of these filters and all of them leak, i replaced the old parts with the new ones and the leak has not stopped. the filters are all about 4years old
Date published: 2015-12-21
Rated 5 out of 5 by from Excellent product. I exchanged the old with the new and that was it. My 360 woke up one morning leaking all over my floor. After cleanup I called Marineland customer service. They were so helpful. Let me say their customer service deserves an award. They recommended I purchase this product so that I can replace the gaskets on my unit. I went on and ordered it on their site. It arrived in 4 days, so the shipping was lightning fast. I replaced all the gaskets and now my baby is humming like a champ. Could not be more happy. Hint, now this is important....Do not replace these gaskets without first lubricating them. I used a silicon grease which I bought at Ace Hardware. Make sure the grease has no petroleum. Otherwise it can harm the fish. It only set me back about 5 bucks which was great. The grease is branded as Ace silicon grease with no petroleum. Believe me save yourself a headache. Buy the grease...I hope this was helpfull. Thanks
Date published: 2015-12-08
Rated 5 out of 5 by from gasket set is perfect Gasket set is perfect I was missing 2 gasket rings on basket and this is perfect thanks marineland u saved my neck now i will not have blowby on the baskets
Date published: 2015-11-04
Rated 5 out of 5 by from Great bunch of gaskets! Work great. Did just what I needed. Marineland website made it easy to order!
Date published: 2015-10-30
Rated 5 out of 5 by from Thanks, didn't want to buy a new tank, the gaskets were great! We have a 30 gal water tank for a Red Ear Slider turtle, he needs his tank to be cleaned completely every 3 months. Taking the pumps apart wears the gaskets out, it is nice to be able to find replacements easily. THANKS
Date published: 2015-10-21
Rated 4 out of 5 by from Replacement Gasket In conjunction with a new impeller my C360 canister is working like new.
Date published: 2015-10-20
Rated 5 out of 5 by from Fixes the C-Series ailments Solved the air sucking problem & annoying noise from the cycling. The kit contains a larger diameter lid o-ring that doesn't (as of yet) need silicone to seal properly. Takes more effort to snap lid on correctly, but definitely feels solid when you're done. I believe the gaskets for the tray tubes are the main reason for the air leaks & noise although. But once replaced, can't even hear the filter run.
Date published: 2015-08-29
Rated 5 out of 5 by from Seals worked great I will be back to purchase anything I happen to need into the future!
Date published: 2015-08-27
Rated 5 out of 5 by from Works everytime It worked but it seems the gaskets wear out too quick. Small bubbles started back after a week with new gaskets.
Date published: 2015-08-23
Rated 1 out of 5 by from No instrection where and how to instal Just received a Gasket Kit for C-360 with out any instruction I don't know where and how to replace. Big name low quality supply. Very disappointed I am still waiting instruction that where and how to replace. If not I have no choice to purchase any other Filter. just west money and time
Date published: 2015-08-12
Rated 5 out of 5 by from it works No more leaking! Air bubbles no longer gettingin the hoses and no water leaking from the lid, the gaskets work great and the shipping took no time at all.
Date published: 2015-07-13
Rated 5 out of 5 by from Fixed a problem that had been irritating for months Always dependable Marineland products do wear out after years of dependable service - these products repaired the problem with little or no issue.
Date published: 2015-07-11
Rated 5 out of 5 by from perfect fix my filter was sicking air, and this did the job. The large O ring is made of a good quality material.
Date published: 2015-07-08
Rated 4 out of 5 by from Fixed the leak! Exactly what the doctor ordered. My filter was leaking and air bubbles were in the hoses. Replaced all gaskets and rings and presto!. Running smooth as ever. Only complaint I have is that the shipping cost are more than they should be based on the light weight packet.
Date published: 2015-07-05
Rated 5 out of 5 by from This product did the trick I replaced the head gasket on two C-360 units along with the upper (thicker) O-ring on each down tube on the valve block and the problems with air and water leaks went away. I also treated the O-rings with Sil-Glyde (Napa Auto Parts). I could feel the difference while placing the head back onto the canister.
Date published: 2015-06-20
Rated 5 out of 5 by from exactly what I wanted exactly what I wanted and fast delivery, easy to find
Date published: 2015-06-06
Rated 5 out of 5 by from Worked great no more leaks My filter was leaking like a sieve and now it's working great
Date published: 2015-04-27
Rated 5 out of 5 by from Super The price was great, shipment was fast and the product was easy to install.
Date published: 2015-04-25
Rated 5 out of 5 by from Problem Solver Only thing that was no included was o ring lube which was recommended to use
Date published: 2015-04-10
Rated 3 out of 5 by from C360 good when it works I have tried to get parts for my 3 c360 for months now, ( Seal kits, Valve Blocks) Not much good if they dont work!!!!!!!
Date published: 2015-01-03
Rated 4 out of 5 by from THIS GASKET KIT IS INCOMPLETE! I have two tanks, both of which have the C-360 filters. When they started to suck in air, I purchased two of the gasket kits thinking they would come with all gaskets needed to do the job right. WRONG! They leave out the four `O` rings needed for the valve block! The only parts I needed. And they do not seem to have ANY FOR SALE! Both of my filters leak at these `O` rings.
Date published: 2014-12-16
Rated 5 out of 5 by from Stops the leaks It works, My filter was leaking and after the install, all leaks stopped!
Date published: 2014-12-04
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How do you get the primer button to work! I have gotten desperate and opened the lid to look at it and i cant seem to get it to operate! Please help! Been going through it with this filter! So dissatisfied!

Asked by: Step
It would help to have more details as to what you mean by getting the primer button to work. If it is stuck, and not moving downward, place the palm of one hand over top of it, then take the heel of the your other hand, and press into the back of the one covering the primer button. Push hard, with both hands to get the button to move downward. Please contact us directly for more assistance. It is easier to troubleshoot if we can speak to you. 1-800-322-1266. BREX
Answered by: BREX
Date published: 2017-03-06

In this pic I know what the big seal is and the two littlest ones are for but what in the world are those other four smaller thick looking ones for???

Asked by: goldes24
Those are the tray gaskets that go on each of the trays, other than the top one. BREX
Answered by: BREX
Date published: 2017-02-21

Where do the smaller 2 gaskets go on the filter?  I have the 360 canister filter but lost my manual... 

Asked by: Kris_t73
Those are spare o rings for the ports on the underside of the valve block. BREX
Answered by: BREX
Date published: 2017-01-16

Large o ring on c360 leaks. Looks like iam not the only one with this problem. Replacing ever 3 to 6 mounts add up unless you do something with the gasket. You know this i have a lot of money in this pump already though i was buying the best HELP 

Asked by: patches62
We are sorry to hear that your gasket is leaking. The C360 has been discontinued for a year and a half, however, the o ring was upgraded around the same time, and the gasket kit has the improved o ring in it. Customers have reported that they had better success with their o rings when they used silicone lubricant after every filter cleaning. If your unit is within the 3 year warranty period of time, please call or email us directly. 1-800-322-1266 or We would be happy to assist you! BREX
Answered by: BREX
Date published: 2016-12-29

attaching the hose to the out and in on the canister. the hose is to big to get the locking nuts to fit.,why? and what are the supplied orings(2) for.

Asked by: budocop
Make sure you have pushed the tubing down over the barbed end, and then over the threads and under the hose nut before tightening up the hose nut. It is a very tight fit, and it is best to sort of twist and wiggle the tubing to get it under them. The o rings go on the underside of the valve block. There are two nozzles/ports on the underside. These o rings will replace the two closest to the end of the nozzle when they wear out. BREX
Answered by: BREX
Date published: 2016-11-07

I just purchased the Marine land 360 filter which came with a large round gasket and a packet with two small round gaskets. There is no mention in the instructions where the two small gaskets / O-rings should be placed. Please advise. Thank You

Asked by: Redfish 21
Those are the two smaller o rings on the nozzles that are on the underside of the valve block. BREX
Answered by: BREX
Date published: 2016-08-08

When will the gasket kit for the new model C360 (Kit# ML90772) be available to purchase.

Asked by: SteveC
I do not have an ETA at this time, but we are working on getting them into the parts program. BREX
Answered by: BREX
Date published: 2016-04-05

Is there a replacement gasket set for the Marineland ML90751 Magniflow Canister Filter?

I've been getting micro bubbles blowing out of the filter and took the top off and noticed a small nick in the gasket. I ordered the replacement gasket set for the C-360 but it does not fit the Magniflow filter head
Asked by: JOE123
We do have one, but it is not sold separately at this time, because this design is so new. Just call our Consumer Relations Team at 1-800-322-1266 and they will send you one. It is item ML90772-00 for the Magniflow 360. BREX
Answered by: BREX
Date published: 2016-02-10

How do I stop the rush of constant micro air bubbles ?

I have a c360 for about 1.5 yrs. after changing and cleaning filters and canister. I am getting a constant rush of Micro bubbles. I tried resetting all the trays and after restarting I still get the gushing of bubbles. Also when I push the key back to close the valve to stop the water flow I am getting a continual drip. Can this be fixed? Or will the unit which connects to the tubing have to be replaced?
Asked by: Stevosps
Sounds like some of your o rings need replacing. I would replace the whole valve block with a new one (they aren't very expensive) and would also replace the large motorhead o ring. BREX
Answered by: BREX
Date published: 2015-12-09

360 pump

i just replaced the orings last week and in that short of time the large oring started leaking from the top
Asked by: rudedude
probably just got pinched open remove and turn over and try again sometimes works
Answered by: sprea53
Date published: 2015-09-10

Is there anything I can do to stop the air bubbles coming from my C-360 filter besides replacing the valve block that is hard to find in stock?

Let me start off by saying I love my Marineland filter and I have had my C-360 canister filter for a couple years now, and it seems that I constantly have issues with small air bubbles. After doing some reading from other customers with the same filter, I noticed I was not the only person with that problem. My first fix was just replacing the valve block and it worked great for probably a year and than it came right back. After more reading I learned I could put some form of grease / vasoline on the o rings to help make a better seal. That also work for a shorter amout of time, so to fix the problem I was just going to replace the valve block again, but it is never in stock. My question is when will they be back in stock, and is there anything I can do to stop the air bubbles till then. It is starting to get really bad which is causing to filter to be very loud and annoying. Thanks
Asked by: MazdaMan
Replaced the O rings on and my problem went away after almost a year of annoying bubbles
Answered by: VictorE
Date published: 2015-07-12

Leaking/Dripping under Motor Head

My unit just started leaking/dripping under the motor head. Thinking it is the gaskets, but perhaps the valve block? Thoughts? Unit is about 4 years old - running great up until this time.
Asked by: gofish
it is gaskets happened to me after I changed them no more dripping
Answered by: jute
Date published: 2015-06-07

Small O rings

I just bought two c360s, and I can't figure out where the two small o-rings go. Can you please help?
Asked by: jv72
Those are spares for the nozzles on the underside of the valve block. BREX
Answered by: BREX
Date published: 2015-02-18

Canister filter C360

I'm looking to order two set of Gasket Kit for C-360. please let me know how soon i can have theme. Thanks
Asked by: azoulay604
They will be in stock by early next week. BREX
Answered by: BREX
Date published: 2015-01-28

how long will the C360 gasket kit be out of stock?

Asked by: HAMBY
A new shipment will be in sometime next week. BREX
Answered by: BREX
Date published: 2015-02-04

I ordered the gasket replacement kit Product No. PR11942-01 from amazon. The C-360 canister leaks terribly and the large oring looks too small.

Please advise me to which one I actually need and where to get it. I see that marineland is out of stock.
Asked by: Trevor
That is the correct kit. The large o ring is coiled up, just uncoil it. BREX
Answered by: BREX
Date published: 2015-01-21

When will gasket kit for C-360 be available?

Asked by: HAMBY
We have another shipment coming the last week of this month. BREX
Answered by: BREX
Date published: 2015-02-04

C360 canister filter leaking from back side of canister near prime button & clamps.

I have had this filter for 2 years now and since day one i have had bubbles coming out of one hose and now i just noticed when the power goes off in my house circuit breaker going off or to be disconnected by cut off valve the canister will leak slightly. My last maintenance of the filter resulted in alot of water coming out as the canister is restarted ie priming unit and water coming out near the clamps to lock unit tight. I did apply lubricant to the product. Will the kit you sell stop the leakage in which has occurred i am nervous about using this again for i do not want 90+ gallons of water on my hard wood floor if i am not around to stop it.
Asked by: websterzx10r1
Yes, it will. It sounds like you are in need of the large o ring for the motorhead. So unless there is a crack somewhere in the motorhead that you are unaware of, the o ring would fix your issue. BREX
Answered by: BREX
Date published: 2014-12-19

Gasket Kit PR11942

I need to purchase a "Gasket Kit" (Part No. PR11942) for my Model C-360 Canister Filter. However you show the part is "Out of Stock". When do you expect the kits to be available? My canister leaking when shut-off and sucking air when running. I want to order two (2) so I can keep a spare on hand. Thanks, Dan
Asked by: danbailey
Dan, the `O` rings you need are not included in the kit #PR11756! I too am lost as to where to get these `O` ring for the valve block.
Answered by: SuckingAir
Date published: 2015-04-18

how long will the C360 gasket kit be out of stock?

Asked by: Power
Until sometime later this month. Please just email or call us direct, and we will send you the large one, if you need it, free of charge. We have that one in stock, we just do not have the entire kit in stock. BREX
Answered by: BREX
Date published: 2014-12-23

when will this be in stock?

we need this quickly our canister is leaking
Asked by: loricummings
It is due in later this month. Call or email us directly with your info, we have the large o ring in stock by itself. We are designing a new replacement kit including only the large o ring so it is not ready for selling yet, but we would be happy to send one to you asap. BREX
Answered by: BREX
Date published: 2014-12-09

When will gasket kit for C-360 be available?

Asked by: rblockmd
Later this month. If you need a large o ring, just call us, we have those separately. BREX
Answered by: BREX
Date published: 2014-12-03


I need a gasket kit for a C-360 and cannot find one anywhere. All out of stock. I need to large O-ring and one of the rubber gaskets for the media trays. Do you have a list of sellers? I've tried PetSmart, Big Al's and all the private stores in Ottawa.
Asked by: corrie
Just call or email us and we can send the large o ring to you. We are building some new kits that will contain only the large one. The tray gasket is not critical, the filter can be run without it and we do not have that one in stock since the main kit is out of stock. We do expect more in later this month. You may also tray,, and I'm not sure if they all ship to Canada or not, but worth a try. BREX
Answered by: BREX
Date published: 2014-12-02

Where do I install the gaskets

My c-160 filter is leaking and sucking air, and I bought a gasket kit, but can't find any instructions or diagrams online for where they go.
Asked by: karymaye
It may be best if you call in, but basically, the large one goes in the same spot as the large one that is already in place around the motorhead. The two small o rings go in the same spot as the small ones on the two nozzled that extend down under the valve block. The rest are tray gaskets. BREX
Answered by: BREX
Date published: 2014-11-13

When will the Gasket Kit for the C-360 be available for purchase online need badly?

Asked by: lilmissjers
At this time I do not have a definite date, but I believe within the next two weeks. If you are in need of the large o ring, just call or email us directly. Mention me, and we'll send one to you for free. We have the large o rings here, but do not have the smaller ones. BREX
Answered by: BREX
Date published: 2014-10-23

Where can I find seal kits for may c-360 filters ( I have 3 )........

Asked by: jman
We expect them back in stock here around the week of October 20. In the meantime, check your local fish stores, as well as,,, and BREX
Answered by: BREX
Date published: 2014-10-06

Gasket Kit for C-360Gasket Kit for C-360

My tank is leaking in air very steadily, just started about a day ago, tried fixing it but no luck. I wanted to try this gasket kit but it is out of stock, do you know when it will be back in stock, as my filter is very noisy with all the air blowing into my tank.
Asked by: 2crazey
We expect a new shipment the week of October 20. In the meantime, try silicon sealant on the large o ring. Also, check your intake tube and valve block o rings, make sure they are okay and put silicon on them as well. BREX
Answered by: BREX
Date published: 2014-10-02

When will the c-360 gasket kit be available?

I need this fast as I am now emptying a bucket that the pump sits in. Can't afford to replace the pump.
Asked by: c360
Our gasket kits should be back in stock mid October. If you have had your filter less than three years (our warranty period on this product) please give our consumer relations division a call at 1-800-322-1266 Mon. - Fri. 7:30 AM - 5:30 PM EST to see what we can do to assist you further. Marineland2
Answered by: BREX
Date published: 2014-10-09


Unfortunately, I am having the same problem as many others, my pump sucking air and leaking. Apparently there is no solution from Marineland and I'm beginning to think they're just blowing air while not supporting their product or customers. I'm very unhappy that I ordered new O-rings now that I see it won't solve my problem. I am also very unhappy that I now have to research and purchase a new pump and filter....of course from a different manufacturer if I don't get a timely response. The system isn't even a year old.
Asked by: Dungeree
Your filter has a 3 year warranty. Replacement o rings typically resolve air and/or leaking issues, as long as the vinyl tubing has been installed correctly, and the valve block is not blocked. If they do not resolve the issue, you also have the recourse to ship your filter back in its entirety to our returns facilty and we will replace it for you. This format is not the most expedient format for assistance as we only answer questions posted this way, each morning, Monday through Friday. Calling our 1-800 number is best. Returns address: Attn. Warranty 555 International Parkway Daleville, VA 24083 BREX
Answered by: BREX
Date published: 2014-08-18

My marineland c360 is leaking, so getting the gaskit kit, it also leaks water out of the primer, will the kit help that too.

Asked by: Kathyo
No, the gasket kit will not help with the primer leak. If the unit is less than 3 years old, we would recommend sending it back for a replacement one. BREX
Answered by: BREX
Date published: 2014-07-30
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