Correct hook-up for BW Valve

[jtcaputo]

I was just told that my backwash valve is plumbed incorrectly. I would like to verify that before I have it "corrected." The connections from the top to bottom are: from pump, to pool, backwash discharge. To backflash you pull the slide handle up.
I was told that it should be push down to backlash. The filter is a Pentair Quad.

 

[jtcaputo]

I should have added that the system functions as is. There are problems that I don't know are related. I get DE in the pool and some cavitation at the pump.

 

[kadavis]

The QuadDE filter valve should be plumbed just like the Pentair TR sand filters. The waste is on the top and the return to pool on the bottom

 

[ajw22]

Yes, it needs to be changed.

You should be plumbed as shown in Figure 3 on page 4.

https://www.pentair.com/content/dam/extranet/product-related/product-manuals/pool-and-spa-equipment/valves/Two%20Position%20Slide%20Valves%20for%20Pool%20Filters%20Owners%20Manual%20English.pdf