How to Replace a Spider Gasket on a Multiport Valve

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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.

Click Here to View Our Spider Gasket EZ Find Chart

Click Here to Find All Multiport Valve Parts (Covers, Diverters, Gasket Kits & More) 


Video

Step by Step

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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.

Click Here to View Our Spider Gasket EZ Find Chart

Click Here to Find All Multiport Valve Parts (Covers, Diverters, Gasket Kits & More) 


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.

Click Here to View Our Spider Gasket EZ Find Chart 


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

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

Click Here to View Our Spider Gasket EZ Find Chart

Comments

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(1 to 40 of 204)

 Posted: 8/9/2020 

after back washing my multi port valve is leaking thru the backwash pipe. will replacing the spider valve fix this . It just getting worse and worse where now it wont stop leaking. probably 2 gallons an hour or more
 Reply

InyoPools Product Specialist  Posted: 8/31/2020 

The only way to figure out what the issue is is to open the valve to inspect the gaskets and the diverter stem assembly. The issue could be a bad diverter spring, an out of place washer, or jiggly handle. How To Maintain and Repair Your Multiport Valve
 Reply

 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!
 Reply

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. 
 Reply