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First, it's not that you can't backwash the filter, its just that you will lose any CYA you have added to the skimmer that hasn't dissolved yet. If you are trying to clean up a dirty pool, and the pressure rise of the filter indicates it needs to be backwashed, I would tend to think that this...

No. Adding another return will LOWER the resistance to flow. It's the same as increasing the pipe and return nozzle size. The volume and speed of the water coming out of the return will be reduced since now its split between two returns. I would expect to see the pressure gauge on your...

In my opinion, the pump to filter size is more of an issue than the pump to pool size. Filters are rated for a max flow rate based of the surface area of the sand. With an AG pool, there is not normally the same amount of head loss in the plumbing that one would see with and IG pool. Because...

Thanks. I see what you mean. :)

Most people don't appreciate the power of PI R Squared! A 2" pipe is 78% larger than a 1 1/2" pipe. Same idea with pool sizes. A 24' pool will hold 78% more water than an 18' pool (13,500 gallons vs. 7,600 gallons). :shock:

Yes, or at least be able to lower the level if I want. I would only ever open that valve with the pump off. I'm thinking it would be handy if I need to lower the water level in the winter and already have the pump and related equipment winterized. This drain line is below the frost line...

I'm doing some plumbing on my pool, and I'm curious if anyone can tell me if there will be a major difference in head loss between the following two configurations (ignore the periods). 1.)................Pump .....................|| .....................|| Main Drains === Tee === Valve ===...

I wonder how much of the benefit from Aqua Genie Skimmer is the negative pressure zone created at the skimmer vs simply getting as much of the return water as possible to the other side. Has anyone out there actually used one of these and want to comment on it? I wonder if it could be retrofit...

I was looking at larger above ground pools recently and I was amazed that every one of them had one skimmer and one return coming though the same panel, not more than 2' from each other. I realize the logic for doing this has to do with the flexible hose lengths and having one stainless steel...

I had to reply.... I have a 15' easy set Intex (actually measures about 12' across the top of the open water). This year I added a 24" Hayward sand filter to it (with Zeobrite), plumbed in one additional suction port and two additional returns. I have a Hayward 1 hp pump running the whole...

Hi all! I recently picked up a new 24" sand filter. I've noticed that filters 30" and larger tend to use a layer of pea gravel in the bottom of them before the sand is added to better distribute the hydraulic pressure on the sand when backwashing the filter. Does anyone know if this would be...