Multiport problem

[True Blue]

I went out to check on things and decided to backwash. As I feared, afterwards the leak during filtration was back.

[PoolDoc]

Based on the pics below, it appears you can use a 1.5" x 6" PVC nipple and a 1.5" FIPxFIP PVC ball valve to solve your problem temporarily. Both of those items are available at my local Lowes . . . but I don't know about yours.

Ben

[CarlD]

Yes, I can get those things easily here in New Jersey, maybe even easier than Ben can in Georgia.
It's a Hayward multivalve and those things are pretty much the same.

Carl

[True Blue]

I've determined that it isn't filtering properly. My pressure guage was broken, so I couldn't quite tell, but I suspected a problem. I read in another thread on here how to test for proper filtration using DE. I did that and my suspicions were verified. My question is, do I need to replace only the multiport? I assume that the filter does nothing more than hold the sand.

[CarlD]

I can think of 3 reasons you're getting blowback on the DE test.
First, the obvious: It's your multivalve.
Second, you may not have sufficient sand and it's passing through
Third, It's also possible your laterals are cracked or broken...but that explains the DE, not the leaking.

You could fix or replace just the multivalve. If the problem goes away your are done. If not, you'll need to empty the sand and inspect/replace the laterals, and refill with new sand.
It should STILL be cheaper than replacing the filter.

Of course, you could replace the whole thing with a bigger filter. I'm wondering if the pump is too big for it....what model and brand pump is it?

Carl

Carl

[dcarlton]

I have a similar problem with mine and I can get it to quit if I do the following. My filter looks very similar to yours.

I use the handle at the top to rotate it through the various settings on the pump, sometimes working it into each one of them. I will then usually move it back and forth, clockwise/counter clockwise, and then choose the filtration mode. When I do this, it usually quits leaking out the port. If this doesn't work the first time, try it again, mine sometimes takes a couple of times to make it quit.

I've also thought of using the winterizing plug that I put into the pool wall fitting (it has a rubber stopper and a butterfly nut to tighten it into place). Since there is no pressure, I think this should work but I haven't tried it yet (since the above procedure seems to work for me).