How to Replace a Spider Gasket on a Multiport Valve


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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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 Posted: 11/6/2019 

No water coming out of our pool jets. We noticed a few leaks on skimmer side that we glued. There are bubbles in pool pump. It appears the plastic under backwash handle is cracked, would that be a cause or do you think we have a clogged line? Thank you in advance!

InyoPools Product Specialist  Posted: 11/7/2019 

Most often, the reason why you are getting air in the pool pump is due to an air suction leak. In this video called "How To Determine Why a Pool Pump Won't Prime" we discuss and show the ways to inspect and resolve these types of issues. 

 Posted: 7/10/2019 

The pentair multi valve is leaking alot. I have another gasket do I need to glue it? maybe clean it up when I replace it and also only has filter, waist, closed, backwash, recirculate and rinse? which positon do I put it in before unscrewing

InyoPools Product Specialist  Posted: 7/11/2019 

Is the one you are replacing glued-in? If not, then you do not have to glue in the new one. It does not matter which position the handle is in before you removed the key-cover assembly.

 Posted: 6/27/2019 

What causes sand to come back into pool pool

 Posted: 7/17/2019 

The sand is old and has started to smooth. Just need to replace the sand. Usually every two to three years.

InyoPools Product Specialist  Posted: 7/2/2019 

A whole host of things: Sand in Your Pool?

 Posted: 6/6/2019 

How do I stop the water from coming at the top so that I can replace the key assembly gasket?

InyoPools Product Specialist  Posted: 6/12/2019 

Have you closed your suction side diverter or ball valves to prevent backflow?

Anonymous  Posted: 5/4/2019 

Can you do this while its hooked up with water in filter?

InyoPools Product Specialist  Posted: 5/6/2019 

Yes, but make sure the pump is turned off at the breaker and that any shutoff valves are closed to prevent any surges of water.

Anonymous  Posted: 5/6/2019 

Okay thank you! I just wanna get my pool set up already right now i just got a hose on the backwash valve & into the pool so i dont lose water

 Posted: 3/4/2019 

How often should you change a spider gasket on a multiport valve?

InyoPools Product Specialist  Posted: 3/4/2019 

Hello Justin - The spider gaskets can last a few years. It's usually time to replace it when water starts to drip from the backwash line when the valve is set on filter mode.

 Posted: 12/13/2018 

I replaced my flow valve a couple years ago and didn't know they had changed the spider gasket. I had a spx710xd that I had a spare . The new one is a spo714c or spo714g11m they don't look the same as the old one will it work or what do I need? Couldn't find these new spider gasket at any outlets. Help

InyoPools Product Specialist  Posted: 12/18/2018 

Hello Clifford - First thing, if they do not look the same, then they wouldn't work. The gaskets would need to fit into the same grooves as the one it is replacing. The SP714T and the SP710 series uses two different spider gaskets. They are the SPX0714CA and the SPX0710XD, respectively.

 Posted: 10/7/2018 

Thank you! For posting this video!!!! It was so easy! Last time I paid a poor repair company to do it. Thanks again!!!!!!

InyoPools Product Specialist  Posted: 10/8/2018 

Jeanine, Thanks so much for the kind words and we are glad we could be of help!

 Posted: 8/14/2018 

Hello George - this is an odd situation. A gasket should not fail that often, especially one as vital as the spider gasket. The couple of things that come to mind the gasket groove or diverter has a defect. But if the problem has persisted to a new valve, the likelihood of that being the cause falls greatly. Are you changing positions while the pump is running? This is a common mistake made by pool owners. The pump needs to be off when changing valve positions or the gasket can be dislodged or damaged.

 Posted: 8/13/2018 

I replaced the gasket on my Hayward Multiport Valve (710XR50) multiple times and every time I need to either backwash or set to Waste the gasket gets Pinched/Damaged in the same area near the port for waste. I need to replace the gasket every time I move the valve. I also have replaced the "head of the valve" last year thinking this was the cause but trouble remains. Any ideas? Thanks

 Posted: 5/17/2018 

The SP1091Z number did not bring up anything for us. What is the model number of your Hayward filter?

Anonymous  Posted: 5/16/2018 

I have a leak from the backwash "port". I can not longer read the SP number on the top of the filter. I did get SP1091z off of an imprint in the backwash port. What part number do I need for a new gasket? Thanks

 Posted: 3/9/2018 

Ed - The spider gasket for the SP0714 family of valves is no longer sold alone but is sold glued into the valve diffuser. To replace this gasket, you will need to purchase the Key/seal Assembly (Diffuser w/ Gasket Glued In) (spx0714ca).

 Posted: 3/8/2018 

Hello, I need a spider gasket for a SP0714G11M. What is the correct replacement gasket? Thanks,

 Posted: 2/14/2018 

darlynne huddleston - There are several models of the Triton II Pac-Fab valve. I would have to have the model number of the valve to pinpoint the spider gasket. Your best bet might be to try to match the number of spokes and dimensions of your gasket to this spider gasket list.

 Posted: 2/13/2018 

My filter is a Triton II . Pac-Fab...which gasket do I need. sent for one but it doesn't fit in size...

 Posted: 2/12/2018 (SP0714 gasket) - Hayward no longer sells the spider gasket on a SP0714 by itself. To replace the gasket you must buy the Key/seal Assembly (Diffuser w/ Gasket Glued In) (spx0714ca). See our guide on "How to Replace a Hayward Key Seal Assembly".

Anonymous  Posted: 2/11/2018 

I have the Vari-Flo XL valve SP0714. Which gasket does it use?

 Posted: 10/19/2017 

Bill - Yes, that is a match for your model. And Since your model does not have a Winterize, you can use use any of the other positions when disassembling the valve. Just make sure it is assembled in the same position and lift it straight off when pulling it apart.

 Posted: 10/13/2017 

Ralph - If your gasket was not secured with glue, it may have rolled out of parts of its groove, causing the seals between the ports to leak. Pull the top of the valve off again and see if your gasket has moved out of the grooves. If so, check for any damage to the gasket, replace if necessary, then glue the gasket into the grooves as suggested in this guide.

 Posted: 10/9/2017 

I replaced my gasket but forgot to put glue on it, is that the reason that even when in filter mood my filter is throwing water out like if it was in backwash? It even drained out my whole spa... anyone know if this is the issue or something else? Only time water stops coming out like if it was in back wash is if I close all the valves off

InyoPools Product Specialist  Posted: 9/15/2017 

DMG123 - As you probably know, some valves come with the spider gasket glued in solid. The only way to replace the gasket is to but the key assembly that holds them. When you say the gasket was completely melted, was it damaged or was the gasket just installed solidly? Was it deteriorated to the point where it leaked like the first one? If so, that is highly unusual, and I would talk to the company you bought the valve from.

 Posted: 9/11/2017 

Hi, I have replaced my multiport valve last year due to the gasket seemingly melting into place, unable to remove anything more than bits and pieces. I just received the new valve, which came with a gasket, flushed the lines and went to check the gasket after and again, completely melted. Anyone ever deal with this? I am wondering if they came melted in, from being stored in a warehouse in the heat or something?

InyoPools Product Specialist  Posted: 9/3/2017 

john p - It sounds like the previous owner used the wrong glue when he replaced the gasket. You may be at the point where you have to buy a new Key Assembly that holds the gasket. See our guide on "How To Replace a Pool Multiport Valve Spring" This guide includes information on replacing the Key Assembly.

 Posted: 10/29/2018 

I have Model SPO715G50M. I bought the kit to replace the o rings, but I cannot remove the spider gasket. This is the first time this is being replaced. Is it glued in?

InyoPools Product Specialist  Posted: 10/30/2018 

Hello PGB - Yes, the original spider gasket in the SP0715 valves is glued in place. Steps 4 & 5 explain how to remove the old gasket. We would recommend using an RTV silicone adhesive when you install the spider gasket. The spider gasket for the SP0715 valve is part number 4701-10.

 Posted: 8/30/2017 

I did everything this guide said up until removing the old gasket. I physically cannot remove it no matter how hard I pull and I can’t upturn it with screwdrivers, pliers or any other tool. I’ve basically torn off a lot of the rubber but there is still so much I can’t remove. I don’t know if I’m doing it wrong or the original person who installed did it wrong. Please helP

InyoPools Product Specialist  Posted: 7/18/2017 

Anonymous (handle won't turn) - The white plastic bearing washer underneath the handle may be broken. See our guide on "How To Replace a Pool Multiport Valve Spring" for instructions on locating and replacing this washer.

Anonymous  Posted: 7/16/2017 

I just replaced my gasket and now the handle won't turn and water is still coming out the backwash line while it is set to filter. Any ideas?

 Posted: 7/3/2017 

I just ordered your Vari-flow 5 Gasket for my Pentair Multi-port Backwash Valve (27-1140) being run with a Triton Sand Filter and a Hayward pump. This is my second try so I'm just trying to get it right! Will this work? Thanks....