How to Replace a Spider Gasket on a Multiport Valve

Written by:  Danny Rhodehamel
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 (3.53 OUT OF 5 STARS ON 19 RATINGS)

Follow these steps for spider gasket replacement for pool filter multiport backwash valves. PLEASE NOTE THAT THE VALVE USED IN THIS GUIDE IS FOR ILLUSTRATIVE PURPOSES ONLY. THE DIFFUSER ON THIS VALVE COMES WITH THE SPIDER GASKET PRE-GLUED IN.

Tips & Warnings

Video

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.

Step 5

Make sure that the gasket groove is free of water, grease, oils, debris and parts of the old gasket. Use alcohol to degrease. 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.

Comments (41 to 80 of 110)

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User: Inyopools

Horseshoe - Check to see that you spider gasket in set properly. Remember to turn your pump off each time you move the valve handle. If you don't, you can damage your gasket. Also check the pressure on the handle when you press it down. You may have a weak or broken spring in the handle. See our guide on "How To Replace a Pool Multiport Valve Spring".

User: 

i am getting sand in my inground pool.I vacumed the sand from the pool. when i turn on the sand filter 15 to 20 minutes later there is sand in the pool. I changed the laterals and i'm still getting sand in the pool. I was told i may have a bad vari-flo valve. do you think this may be the problem

User: Horseshoe

My SP715 multi port valve was leaking at the handle. I was also having a slow stream of water comming out of my backwash outlet. I ordered a new multiport valve, o-ring, and spider gasket. I replaced all of this and am still getting a slow stream of water out of my backwash outlet. Any thoughts????

User: Inyopools

mgzych - Your problem is a common symptom for a damaged spider gasket. Unfortunately, Hayward no longer sells just the spider gasket for that valve. You have to buy the Key/Seal Assembly with the gasket glued in. See our how to guide on taking off the spring for information on replaceing this assembly.

User: mgzych

I have a Hayward S244T sand filter with SP0714T1 Vari-Flo XL valve. Water flows from waste pipe when filter is in "Filter" mode. Does that sound like spider valve gasket replace and/or re-seat? Do you carry this gasket? What's the right part number? Thanks!

User: Inyopools

OakPool - We recommend this Adhesive For Valve Seat Gasket as a fairly economical option.

User: OakPool

Loctite 401 or 416 is mentioned in manufacturer instruction. I couldn't find them in local stores. Any substitute we can use to glue down the gasket?

User: Inyopools

Mulligan Man - According to one manufacturer, the glue they use should peel out with a small screwdriver. Someone may have used the wrong glue on your unit. The rep cautioned against using harsh chemicals that may eat into the plastic. If you are unable to remove most of the glue and residual gasket with a small screwdriver, you may have to purchase a new plate that the gasket fits into.

User: Mulligan Man

Hi Inyo. WE have a Pac Fab Hi Flow Valve and the tech data parts sheet I have from this is for Cover assemblies 26-1049,26-1050,or 26-1142. We have been experiencing increased leaking out of the valve the past 3 years and believe it is the spider seal diverter part number 4623-10. The old Seal Diverter is set into the Plate assembly and appears to have been glued in and is very difficult to remove. It is a 5 spoke and is close to 7.5" diameter seal. I am having difficulty removing the old seal from the groove in the plate where the new seal will fit with appropriate glue part number SPX071029- I don't want to bang up the plate by digging into the groove which may impact the seating of the new valve - any suggestions??

User: Inyopools

laddi -Your gasket track does not have to be perfectly clean, but get enough of it out so that you don't have big bumps when you put in your new gasket.

User: laddi

I am trying to replace the spider gasket on my multiport do I need to get every last bit of the old gasket out of there? It was glued in and I have not found anything that will get all of it out! I have scrapped at it with a small screwdriver as suggested in one of your posts but I can not get all of it out! Please help

User: Inyopools

johnnyW - Yes. Hayward is recommending that all spider gaskets for their multiport valves be glued in. They recommend using their Rubber Gasket Adhesive - part# SPX0710Z9.

User: johnnyw

Do I need to glue gasket on SPX0740DE valve? If yes what should I use?
Thanks a lot for this post.

User: InyoPools

nicspool - Recheck your spider gasket to make sure it is seated properly. Then check your handle spring. If it is weak or broken, it may not be providing enough pressure to close the required ports. See our guide on replacing a multiport valve spring.

User: InyoPools

Mike - I talked to a couple of vendors and they both say there is no easy way to remove a glued in spider gasket. They use a small screwdriver to work it out. Takes a good hour. When you glue in the new gasket, Hayward recommends using a 3M adhesive, PN SPX0710Z9. It's less permanent and makes removal easier. Don't use super glue.

User: nicspool

hi, we've replaced our spider gasket but water is still coming out of the waste pipe can you suggest next step to take

User: InyoPools

GWoody - If your old spider gasket on your PRAHER MODEL SM-20AO 6 position valve was not glued in, I would not glue the new one in.

User: InyoPools

Russ - If your gasket looks exactly like the one in our guide - with 4 spokes, it fits on a SP714T valve. Unfortunately we no longer sell that gasket by itself. It only comes glued into the diffuser. See part number 4703-23. Note: any reference I see for a SP714T1 valve shows a 5 spoke gasket.

User: GWoody

i am replacing my spider gasket on a PRAHER MODEL SM-20AO 6 position valve cover. should i glue the gasket in?

User: Russ

My gasket is the same in shape and color... exactly like your pictures. It's on a Hayward SP714T1 vavle but I can't find just the gasket. Any suggestions would be awesome.

User: Mike

Removing the gasket from its seating is very difficult. It is glued in and breaks up when I try to pull it out. Any tricks I might try? Is there a suitable solvent.

User: InyoPools

duke - From your description it looks like you have a Jacuzzi 6 Way valve. The spider valve for this valve is pn 4628-13. Check its dimensions - outer diameter should be 5 3/8', inner diameter 7/8". Unfortunately you cannot buy the spider gasket separately. It comes pre-glued to the diverter.

User: duke

I have a tan or beige MFM17 Filter with DV-6 Valve assmy. Are spider gasket's availkable for this and how do I order them?

User: fabricator

so my spider gasket is shot. how do i find the correct replacement gasket? i have a jacuzzi sand trap filter model st-24. i find an exploded view of the filter, but it does not show the gasket. do i have to buy the entire diverter just to get the gasket? or is it available as an individual part?

User: InyoPools

gman - Yes, after you have placed the spider gasket into its groove, I would lubricate the top surface of the gasket.

User: gman

does the new gasket need to be lubed before install

User: InyoPools

Iscrewedup - You may have a blown spider valve. I would check that first.

User: Iscrewedup

So today I was back washing my pool and forgot to turn the main pool water return valve back on when I was finished. Unfortunately I left my pump on so now, even though I have set the filter to filter, I am losing a significant amount of water through my waste valve. I'm assuming this is because I had the return valve off so the water pressure built up and ruined something in my valve??

My question is: did I ruin my multi port valve and need to replace it or did I ruin the spider gasket? Have to figure this out soon! My pool will quickly turn into a lake if we can't filter!

User: InyoPools

basingers - Put the smooth / flat side down; the ridge / rounded side up.

User: basingers

I am replacing the spider gasket on my pool's multiport filter valve. I must glue the gasket in. I noticed one side of the gasket is smooth; the other side has a ridge. Which way is up... or rather, which side is glued to the top mount body?

User: InyoPools

ParvinT - For a Jacuzzi 7 Multiport valve: the valve cover has 2 small tabs which are different in shape.
One of them has both sides curved and the other has a flat side. The valve body has the same set up, so you very easily tell how the cover mounts. The trick is to get the handle on correctly. When the cover goes on, the “Filter” setting on the cover will be pointing toward the “Return” port on the body.
When you put the handle back on, point the handle toward the “Filter” position on the cover.
With the handle pointing toward filter, the single hole in the diverter should be directly under the “Test” position on the label.

User: ParvinT

Does anyone know the postion of the opening on a 7 multiport valve. When I put my replacement valve in an the handle is in the filter position the opening is 2 spaces to the left. Is this correct?

User: InyoPools

ParvinT - If you can backwash and drain without a problem, it sounds like you have replaced the part correctly. I would check the spider gasket again and see if is seated properly all around. And be sure to have the pump off where you change valve positions or you can damage the gasket.

User: ParvinT

I replace the Jacuzzi 7 dial valve replacement parts and handle. After I let my pool run for 45 mins it starts a light leak through my drain. what do I do and how do I know if I replaced the part correct to the position. I can backwash and drain without any problems?

User: InyoPools

Guy - If you haven't yet, replace your spider gasket before you buy a new valve. It is the most common cause of misdirected water.

User: Guy

I been losing all my water to the skimmer level everyday. I disconnected my drain pipe with the pump running with the selector switch in normal position and lots of water was running out the waste pipe. Bad switch or something. I am going to take my cap off the selector switch and try and see what went wrong. Might need a new selector switch for my pump bummer

User: 

I had to replace my spider gaset cause after I back washed the water was still running out of the backwash side

User: InyoPools

Leo - Unless I'm missing something it sounds like your problem is a leak above the bottom screw of your skimmer, either in around the skimmer seal or in the top part of the lining. If it were the spider gasket, the water lose would not stop at the same point. I'd check for leaks around the skimmer - try tightening the mounting screws.

User: Leo

I am having to refill my in ground pool every 2-3 days. It looses 4/5 inches. It does not go lower than the first screw (from the bottom) out of the three screws on my two skimmers. I was told it was my spider gasket. What else could be wrong.

User: InyoPools

mrm - Your new sand may need to be cleaned of small sand particles. To do this run the filter in backwash position for a while until you don't feel grit in the waste water. Then run Rinse for 1 min and switch back to filter.

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