How to Replace a Spider Gasket on a Multiport Valve

WRITTEN BY:  Inyo Pools

  3.34 out of 5 stars on 29 ratings
(Click on a star to add your rating)



Step by Step


Step 1

Stop pump and release all pressure from system.

Step 2

Place the selector handle at the "winterize" position (this lifts the plug off the seat).

Step 3

Remove the bolts and nuts holding the cover to the valve body. Remove the cover assembly.

Step 4

Remove the old gasket from the valve cover assembly. If the gasket is glued in, you may have to scrape it out with a small screwdriver to get most of it out. Be care that you do not score the plastic groves.

Step 5

Make sure that the gasket groove is free of water, grease, oils, debris and parts of the old gasket. Use NON-acetone finger nail polish remover to remove any gasket residue. Make sure the remover is NON-acetone or it will melt the plastic. Please note that not all multiport valve gaskets are glued in. If the gasket on your valve isn't glued, you would bypass Step #6.

Step 6

NOTICE: Once this step is started, continue through Step 10 without interruption. Using an Adhesive For Valve Seat Gasket apply glue sparingly (a bead about 1/16" wide) to the bottom only (not the sides) of the spider groove in the valve body. The glue lines must be continuous and intersect at the intersections of the grooves.

Step 7

Insert the new gasket into the groove with the rounded bead up. Press the gasket firmly into all groove areas to seat the new gasket evenly.

Step 8

Align the tab on the cover assembly with pin on the valve body, fastening it with the bolts and nuts removed in Step 3. Tighten all bolts evenly.

Step 9

Depress the valve handle and rotate it to the closest standard position (FILTER or RINSE), being careful not to rub the plug on the new gasket. Release the handle, allowing the plug to hold the gasket in place while curing.

Step 10

Minimum cure time is 2 hours. Curing for 24 hours is recommended for full strength.


(1 to 40 of 158)

Inyopools  Posted: 05/15/2017 9:34 AM  Inyo Product Specialist

Karen - Unfortunately, we do not sell replacement parts for the NE6170 Filter 6 Way Valve.

Karen  Posted: 05/12/2017 17:34 PM 

I need a spider gasket, but the only numbers I see on the filter is NF6170, it's a 1.5 hp blue wave sand filter, water leaking out of back wash, pool stays cloudy

Inyopools  Posted: 03/19/2017 23:44 PM  Inyo Product Specialist

Spider gasket - Inspect the gasket again for tears or breaks. Then try lubricating it. If that doesn't work try gluing the cross points on the gasket to the key assembly. don't use a lot of glue. And remember to turn the pump off before rotating the handle.

Anonymous  Posted: 03/14/2017 17:30 PM 

Hi, I have only recently changed the spider gasket. About a couple of years. It still looks new. It has started to leak again from the multivalve. When I replaced the gasket before I did not put any adhesive or lubricated it.

Inyopools  Posted: 09/28/2016 22:29 PM  Inyo Product Specialist

Backwashing without shutting off pump - There's a good chance that you have blown the spider gasket. Do you see water flowing or leaking out the waste line when the valve is in filter mode? Pull off the top of the valve and take a look at the gasket.

Anonymous  Posted: 09/28/2016 10:27 AM 

Hello , my wife did a backwash without turning off the pool first, we have been losing a lot of water since. could she have broken a pipe somewhere?

Inyopools  Posted: 08/13/2016 11:44 AM  Inyo Product Specialist

valve leaking - It sounds like you have a spider gasket going bad. That's the only thing that controls the flow of water through the filter. Check the gasket for cracks and replace it if required.

Anonymous  Posted: 08/12/2016 20:46 PM 

I have a sand filter and an inground pool.I turned off my filter, n switched to backwash to empty water from my pool. I then turned filter off and switched back to filter. There is still a little bit of water leaking from waste pipe it wasn't before

Inyopools  Posted: 08/06/2016 10:49 AM  Inyo Product Specialist

lesg - I could not find a match on FIMTA 50-90 v-w. Try matching your spider gasket to one of these listed in our Spider Gasket EZ Find list.

lesg  Posted: 08/04/2016 6:43 AM 

I have a problem with my 5 way new seat system. The seal is broken, the only name I can find on the unit is FIMTA 50-90 v-w.
Could you please advise?

Inyopools  Posted: 06/27/2016 15:44 PM  Inyo Product Specialist

spider gasket - The large hole in the spider gasket that takes up half of the gasket in used in all modes as the gasket is rotated around with the handle. See our guide on "How a Multiport Valve Operates II" for a more complete explanation.

Anonymous  Posted: 06/26/2016 18:23 PM 

Is the lage hole in the spider gasket for the filter o the backwash?

Inyopools  Posted: 06/20/2016 14:23 PM  Inyo Product Specialist

ronald - I'm not sure what the image you sent me is - It doesn't look like the standard SP0714T MPV. Can you send me a set of pictures of the old Valve, top and side views? Can you measure the stem of the old Key Seal Assembly and the stem of the new Key Seal Assembly? Is your filter a sand or a DE filter?

ronald  Posted: 06/18/2016 8:07 AM 

I can't tell what make and model this multivalve assembly is? Mine is old and faded.
I believe its a Hayward so I bought the replacement for the Hayward SPX0714CA Key Seal Assembly but the shaft is shorter so the assembly does not reach the diffuser (?) to make a seal. The shaft is shorter by about 1/8th of an inch.


Inyopools  Posted: 06/14/2016 11:53 AM  Inyo Product Specialist

Krissea333 - I 'm not sure why you removed the valve handle. You want to separate the valve cover assembly from the valve body by removing the 8 screws. See step #3. This will prevent any water flow to the gasket grooves and give you a dry surface to glue.

Krissea333  Posted: 06/13/2016 8:32 AM 

I am trying to replace and glue the spider gasket but it seems that there is water still flowing after I remove the valve handle. It's not gushing but there is no way I can dry the groove to glue the gasket in. Do I need a whole new valve?

Krissea333  Posted: 06/12/2016 22:33 PM 

I am trying to replace and glue the spider gasket but it seems that there is water still flowing after I remove the valve handle. It's not gushing but there is no way I can dry the groove to glue the gasket in. Do I need a whole new valve?

Inyopools  Posted: 06/12/2016 13:19 PM  Inyo Product Specialist

TerryR - Take a look at the spring and washers on the valve stem. They may need to be replaced. See our guide on "How To Replace a Pool Multiport Valve Spring".

TerryR  Posted: 06/10/2016 18:30 PM 

I replace my gasket that comes as a hole now it's leaking thru the handle suggestions ?

Inyopools  Posted: 06/10/2016 10:05 AM  Inyo Product Specialist

Pool Issues - Many manufacturers have gone to gluing the gasket in to keep the gasket from slipping out. They no longer sell the gasket by itself. If your valve manufacturer sells the gasket separately, slipping out might not be as large an issue. Some customers hedge by spot gluing the gasket at 3-4 intersections to help keep the gasket in place yet make it easier to replace later.

Pool Issues  Posted: 06/08/2016 14:53 PM 

Hello All, I've gotten mixed answers on whether or not to use glue for my new spider gasket on a Hayward sp715xr50.. Does anyone here know for sure? Thanks in advance.

Inyopools  Posted: 06/07/2016 10:35 AM  Inyo Product Specialist

Careless - It sounds like the spider gasket in you Multiport valve is blown and will have to be replaced. Depending on the manufacturer, these gaskets are sold separately or pre-glued into the Key/seal Assembly like this one. If they are pre-glued, you will have to by the assembly to replace the gasket.

Careless  Posted: 06/06/2016 22:23 PM 

I may have turned the multiport handle before the pump was completely stopped (not paying attention). There was a pop and now I can only use the filer port. I do not get any suction when the handle is on any port union except filter. Should I replace the multipart valve or could I have other damage?

Inyopools  Posted: 06/02/2016 16:14 PM  Inyo Product Specialist

Lynchrose - I'm not sure what multiport valve you have with your Jacuzzi Sandtrap filter, but this appears to be the key assembly that is used with the MPVs that mounts on your filter. If this looks like your key assembly, you are right. The spider gasket is glued onto the assembly and can not be purchased separately.

Lynchrose  Posted: 06/01/2016 7:22 AM 

Hi we have a Jacuzzi Sandtrapp St-24 filter
I've noticed and all of the diagrams there was no picture of a separate gasket . Do I have to buy one pre-glued or do they sell the spider gasket separately?

Inyopools  Posted: 09/16/2015 17:10 PM  Inyo Product Specialist

hawaii pool - We sell your SP-715x62 MPV spider gasket separately which may indicate that it does not have to be glued in. When you take your valve apart, see if the current gasket is glued in. If it is, I would recommend gluing the new gasket in.

hawaii pool  Posted: 09/15/2015 23:01 PM 

How do I know if I need to glue the spider gasket in place?
I have a Hayward SP-715x62. Does that require the spider gasket to be glued?
Thanks for any help.

Inyopools  Posted: 08/31/2015 15:02 PM  Inyo Product Specialist

Pool novice - Sounds like you probably have the wrong gasket. Give us a call at 877-372-6038 and one of our service reps will be glad to make sure you have the right size.

Pool novice  Posted: 08/30/2015 18:43 PM 

Every time I attempt to replace our spider gasket it kinks and bunches up in the designated slots. Could I be using the wrong size or just need a stronger dose of patience?

Inyopools  Posted: 08/10/2015 12:13 PM  Inyo Product Specialist

Terry - Try using NON-acetone finger nail polish remover to remove the gasket residue. Pentair rep says it works like a charm. Just make sure it is NON-acetone remover or it will melt the plastic.

Inyopools  Posted: 08/10/2015 11:52 AM  Inyo Product Specialist

sand in pool - If the filter's standpipe is cracked, sand will be coming through that crack into your pool and the pipe assembly will have to be replaced. To do this you will have to remove your filter's sand and I would also replace the sand at this point. I would wait on replacing the spider gasket until you see if replacing the standpipe solves your problem.

Inyopools  Posted: 08/10/2015 11:41 AM  Inyo Product Specialist

john - According to the Pentair tech rep, you pull or scrape the spider gasket out of the bottom plate grooves and then use NON-acetone finger nail polish remover to remove the residue. Be careful not to score the plastic in the groove and make sure the remover is non-acetone or it will dissolve the plastic. To glue the new gasket in, use Adhesive For Valve Seat Gasket.

Anonymous  Posted: 08/10/2015 8:23 AM 

I have sand coming through the returns into my pool. Do you think I need to replace just the spider gasket on the multi port? I also think the white piece (name?) is cracked could this be the issue as well?

john  Posted: 08/09/2015 20:32 PM 

I have Pentair HighFlow MPV, and the diverter seal (gasket) is glued in tight, unlike the Hayward one in your video. Have you tried to remove the gasket from Pentair HighFlow MPV or talked to a Pentair rep about removing it? What's is the best way?

Inyopools  Posted: 08/09/2015 11:33 AM  Inyo Product Specialist

Terry - Unfortunately, it sounds like someone glued the spider gasket in with the wrong glue. If you can't get the gasket completely out without gouging the plastic and assuming this is a Pentair High Flow MPV, you may have to buy a new Bottom Plate, 2" W/gasket, like the one shown in this link.

Terry  Posted: 08/08/2015 17:17 PM 

I cannot get the old gasket off my Hi-flow valve. It looks like it was put on with silicone perhaps.I believe it is called a seal diverter or a spider gasket? I am scraping it and brushing it with a wire brush and I am getting very few results. Any suggestions?

Inyopools  Posted: 07/07/2015 12:01 PM  Inyo Product Specialist

henleytoo - Colors change. The gasket may not be white any longer. Here is a link to many of our Spider Gaskets. See if you can find a match by number of spokes, manf, and dimensions. I would have guessed your gasket is 4710-10X - 2nd row - 5 over.

henleytoo  Posted: 07/05/2015 18:26 PM 

Where can i buy the white gasket? I was sold a black one that will not work... we have a hayward veri flo xl thank you!

Inyopools  Posted: 04/26/2015 9:29 AM  Inyo Product Specialist

spider valve - I've heard this also but I'm sure you are not the only person to turn it the valve both ways. To be safe I would turn the valve clockwise from now on. The more important tips are to make sure the pump is off when you move the handle and to make sure the handle is depressed all the way down before you rotate it. There are no requirements for regularly maintaining the MPV. It may just be stiff from none use.

Anonymous  Posted: 04/25/2015 12:56 PM 

I did not realize until just recently that I was only supposed to move the multiport valve filter in a clockwise direction!! Have I done long-term harm to the valve? (The pool is almost a year old.) That was never mentioned to me by the builder, so maybe it is common knowledge to everybody but me!!

Also, I noticed that the multiport valve seems a little harder to move this year than it did when I closed the pool. I had a tarp over it all winter but it does remain uncovered the rest of the year. Is there any regular maintenance (lubrication of some type, etc.) required to keep the multiport valves working properly?