How to Replace a Spider Gasket on a Multiport Valve

WRITTEN BY:  Inyo Pools

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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.


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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?

Inyopools  Posted: 11/05/2014 9:17 AM  Inyo Product Specialist

DJ - I'm not sure I understand your question. The water must be turned off. The Multiport Valve is taken apart and the cover assembly removed to replace the spider gasket.

DJ  Posted: 11/04/2014 16:04 PM 

How do I keep the water from coming into the multiport when trying to glue in the spider gasket?

Inyopools  Posted: 08/20/2014 9:50 AM  Inyo Product Specialist

Koicarer - Unfortunately we do not carry Aquadyne parts and I would not use a gasket that looks like what you need. Generally they are not interchangeable. Try looking on the internet. I see that Aquadyne filters are listed there.

Koicarer  Posted: 08/19/2014 20:12 PM 

Can you tell me where I can purchase a Spider Gasket for Aquadyne filter? The one in this page looks the exactly same as mine. Thank you,


Inyopools  Posted: 08/11/2014 16:27 PM  Inyo Product Specialist

Jim - Thanks very much for your compliment to Rob. We all like to see positive feedback like this. I passed your comment on to Rob and his supervisor.

jimmac94  Posted: 08/11/2014 16:06 PM 

I chated with Rob in fla. on 7/11/14 he was very very helpful with my problem I am having with my filter...(spiter valve)its nice to talk to someone who is not just trying to sell u something.i know I will be needing new filter in the future mine is 12 yrs old and I will be buying from his company inyopools...again thanks so much Rob...jim springfield mass

Inyopools  Posted: 08/03/2014 12:07 PM 

Rabbman214 - Some of the common problems for low water pressure are contained in this guide: "How To Correct Low Water Pressure in Your Pool System". A clogged impeller is one of the more common problems.

Rabbman214  Posted: 08/02/2014 5:23 AM 

I have low pressure in the filter and backwash position of the MPV and zero reading on the water meter. I replaced the meter and still not enough pressure to filter the water. Any idea what the problem may be?

Inyopools  Posted: 07/29/2014 8:42 AM  Inyo Product Specialist

steph - Not sure why this is happening on a new multiport valve, but it sounds like you may have to replace the spring or washers in the top handle assembly. See our guide on "How To Replace a Pool Multiport Valve Spring" for further instructions.

steph  Posted: 07/28/2014 15:20 PM 

I just replaced the multivaulve on my sand filter. Now its leaking around the handle. Can you please help?!

Inyopools  Posted: 06/28/2014 10:28 AM  Inyo Product Specialist

Jane - If you have to glue in your multiport valve spider gasket, wait 2 hours before you use the valve.

Jane  Posted: 06/27/2014 13:51 PM 

The last step, item 10 references a 2 hour minimum cure time, what does that refer to in the process?

donna  Posted: 05/19/2014 14:38 PM 

yes i need the white gasket the spider gasket and i need the sticker that go on the top the says where the flush and back wash are at

water rat  Posted: 04/25/2014 8:49 AM 

I just bought the new top multi port assembly causee spring and hanfde juat would not adjust. I don't have good flow when I backflush. How do I get that to work?

Inyopools  Posted: 04/07/2014 9:57 AM  Inyo Product Specialist

Poolboy 1 – If you have sand getting into your pool from the sand filter, you may have a damaged spider gasket as you suggest. That is one place to check. Also see our guide on “How To Reduce Sand in Your Pool” for other possibilities to check.

Poolboy1  Posted: 04/06/2014 18:00 PM 

I have sand from the sand filter that is getting into my pool and I also see it when I backwash. Does that mean the spider gasket needs to be replaced? Thanks

Inyopools  Posted: 03/27/2014 12:10 PM  Inyo Product Specialist

Hubsy - I could not find a Praher 310-3 in our system. Try matching the spider gasket by size. See "Spider Gasket EZ Parts" for a list of Spider Gaskets.

Hubsy  Posted: 03/20/2014 15:42 PM 

My system is about about 15-20 years old. I have identified the logo as Praher with an information tag that reads 310-3. Does the "3" designate the vavle as a 3" valve if not what identifies this dimension. Is it the ports/plumbing size. The spider gasket needs replacing (leaking from the backwash pipe)during filtration.

Inyopools  Posted: 10/16/2013 10:24 AM  Inyo Product Specialist

emily - You might try to break the corrosion by tapping around the top of the valve with a rubber hammer. Then apply leverage gently.

emily  Posted: 10/15/2013 16:20 PM 

Hi, The handle on top of my onga filter will not turn. It has been left standing for quite awhile. Have been advised to take off nuts at the top to soak unit but even after the nuts have been removed I cannot take it off.. Perhaps it needs gentle leverage? ?Any suggestions gratefully received.