Pentair Quad D.E. Filter issue

[Moe 103]

As the title states I have a Pentair Quad D.E. 100. I am having recurring issues with the cartridges. They either crack or the bindings snap within two months of use. I am running my pump at about a max of 2400 rpm and the pressure gauge on the filter reads under 2. I have purchased original Pentair 178656 cartridges and even refrained from adding DE.

I am at a loss as to what the issue is.

Thanks

 

[JamesW]

In/out reversed.

What multiport do you have?

Pentair 2" Threaded Multiport Valve for Sand and Quad D.E - 261055​

Pentair 2" Threaded Multiport Valve for Sand and Quad D.E - 261055 - INYOPools.com

261055 - 2" Threaded Multiport Valve for Sand and D.E

www.inyopools.com

 

[Moe 103]

On the multiport?

 

[JamesW]

What multiport do you have?

 

[JamesW]

Does it say for Quad DE?

261055 is the correct multiport.​

 

[Jimrahbe]

Moe,

This is a very common problem when the idiot pool builder installs the wrong MPV...

The wrong MPV makes the water flow backwards through the filter.

Thanks,

Jim R.

 

[JamesW]

261152 is for FNS filters.

Pre-Plumbed Valves - for 1-1 5 and 2 in DE and Sand Filters

Side mounted HiFlow and Multiport valves are designed for maximum performance and working pressures. Available in 1-1/2 and 2 in. threaded or slip models.

www.pentair.com

 

[Moe 103]

This is the multiport I have. It looks the same.

 

[JamesW]

A quad DE works like a sand filter and it's confusing because you use the sand filter multiport and not the DE filter multiport.

 

[JamesW]

Wrong valve.

You have P/N 261152, but you need P/N 261055.

 

[Jimrahbe]

This is the multiport I have. It looks the same.

Moe,

Looks only count in a beauty contests...

You have the wrong MPV..

Jim R.

 

[Moe 103]

Thanks guys. Can I use 261050 or is 261055 the only multiport.

 

[Moe 103]

I didn’t open my pool last year because of home renovations. I remember now that I bought the 261050 in September of 2021 to replace the original/incorrect multiport.

 

[JamesW]

Moe,

We have seen several Quad 100 DE filters that were installed with the wrong MPV... This caused the water to flow backward through the cartridges and blowing them up from the inside out. Happens over time, so the owners did not realize that the flow was backwards..

I suggest that you find the P/N of the MPV and confirm that it it the right one for your filter.. The manual lists which MPV can be used..

Thanks,

Jim R.

Looks like we should have caught this earlier.

I have the Pentair MPV 261055.

Moe,

That is that a good part number...

So much for that idea...

Jim R.

 

[JamesW]

You said that you had a 261055?

 

[JamesW]

Pentair 2" Hi-Flow Multiport Valve with Plumbing for Triton Sand and Quad DE Filters - 261050​

Pentair 2" Hi-Flow Multiport Valve with Plumbing for Triton Sand and Quad DE Filters - 261050 - INYOPools.com

261050 - 2 in.Hi- Flow Multiport Valve with Plumbing for Sand Filter

www.inyopools.com

 

[Moe 103]

I have this on hand

 

[JamesW]

That will work.

 

[JamesW]

I remember now that I bought the 261050 in September of 2021 to replace the original/incorrect multiport.

Did you get the new multiport because you knew the original multiport was the wrong multiport?

 

[Moe 103]

I think I might have asked for help back in 2021 and someone mentioned trying a different multiport? Home renovations kept us from opening the pool last year. When you guys said I have the wrong multiport, it reminded me that I bought a different one. I hope this is the reason because at almost $500 for 4 cartridges it’s getting very expensive.