New Pool Owner With 2 Quick Questions

[duraleigh]

Hi, Null,

I can't answer your important question on the valve....never owned one. Others on the forum do, however, so this will bump you back to the top for a response.

Question #1 is somewhat easier. Don't remove that cap with the pump running!! Seriously, it may be a spare for some future purpose or , more likely, it was for something that has since been removed. If your plumbing appears to be functioning normally, I'd keep thinking about it for a while and I'll bet you'll figure out it's purpose. You might even shut the pump off, take off the cap, and turn the pump back on....be prepared to shut it back off!!

[NullQwerty]

Great. Thanks. I won't touch that old line.

Concerning Number 2 though. Talked to the pool store. They said it sounds like I have 2 return lines. His advice was to always leave it set on 1/2 which uses both lines. One thing I forgot to ask though:

If I have 2 return lines, does that mean I should 3 holes in the pool that requires the eye ball fittings? One that sucks water and 2 that send filtered water into the pool? Because I can only find 2 holes in the pool. Otherwise, where does that additional pipe go to?

[MarkC]

I doubt you have an eyeball fitting that sucks water. That is unsafe as someones hair could be sucked into it and they could be held under water. Most pools have either one or more skimmers and or a main drain that supply water to the pump. After the filter the water is returned to the pool by the return outlets. My pool also has a dedicated line that kind of looks looks like a return but is for a pool sweep to be hooked up.