In ground pool plumbing

[cdnsubmariner]

Hello,

I am installing a steel wall in ground pool and have a couple of plumbing questions.

Are 2 - 45 degree fittings better than 1 - 90 degree fitting or does it matter.

Pictures show my intentions. I have not yet glued the connections.

Does anyone have a picture of their plumbing before back filling.

Thanks

http://i62.photobucket.com/albums/h108/ ... uild89.jpg

http://i62.photobucket.com/albums/h108/ ... uild88.jpg

 

[PoolGuyNJ]

For practical purposes, using two 45s to make a 90 does not make a difference except it's a pair of extra glue joints.

Scott

 

[Sticky]

Hi

I think two 45 joined to form a 90 would give less resistance as the angle is not as sharp more curved but it probably would be much unless you had a of of 90 in your plumbing .

 

[Isaac-1]

Yes, sweeping curves are better than sharp corners, just make sure you have pressure type PVC fittings not the shorter glue joint drain DWV type fittings (45's are a lot more common in dwv). I had to jackhammer up the concrete at the corner of my pool earlier this year because someone used a DWV elbow fitting on the return line (it lasted for 30 years almost to the week before blowing out).

Ike

 

[duraleigh]

Mas985 has done the math but I can remember that he has said many times that 2-45's simply aren't worth it. Use the 90's.

If you would liketo reduce the resistance in your system AND make a better pool, I would suggest purchasing a filter that's a little larger than normal.....around 125% or so of your pumps gpm. That'll more than make up for all the resistance within the 90's and give you a better system to boot.

 

[mas985]

An isolated 45 has a little less than half the head loss of a 90. However, if you put two back to back it can actually be more than a 90 because of the interaction between the fittings and the fact that you have twice the glue joints. So given the uncertainty as to how it would actually work in a real installation, I generally do not recommend back to back 45's or at best indifferent. They take up more room too.

As for swept 90s, if you have a lot of 90s it may be worth it but I remember seeing a pad with nearly all swept 90s and it was a real mess. They take up a lot of room so the lay out tends to be really messy. Underground would be fine though.

My usual recommendation is that upsizing the pipe diameter is a far better choice than dealing with special fittings.

 

[CLRFXR]

Just use the fitting that gives you the tightest group!

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[Heckpools]

That retun line on an angle isnt a great idea... didnt read everyones post so that may have already been said. But once you back fill, the dirt may "push" on that pipe and cause major problems. I would come out of the pool wall a few inches, into a 90, then straight down to the ground.

P.s, holy glue joints batman