Plumbing Question

locoyo386

Member
If I have a 1" gravity feed and a 1" overflow feed, will this two have the same gph rate? assuming 1" constant piping.
 

mantisman51

Active Member
Yes, unless the joints on the down flow have some kind of restriction. Like when I put a 45 degree elbow to drain to the sump on the left side of the tank. The 1" pipe was good, but the ******** diameter of the joint was a little smaller, causing the water to back up. I put a similiar joint on the intake side and it equalized, then figured out I didn't need a sump and pt $250 of worthless parts into the tool shed. OOPS! The previous remarks are the opinion of a technical college graduate and should not be considered scientific or fact based!
 

locoyo386

Member

Originally Posted by mantisman51
http:///forum/post/2934814
Yes, unless the joints on the down flow have some kind of restriction. Like when I put a 45 degree elbow to drain to the sump on the left side of the tank. The 1" pipe was good, but the ******** diameter of the joint was a little smaller, causing the water to back up. I put a similiar joint on the intake side and it equalized, then figured out I didn't need a sump and pt $250 of worthless parts into the tool shed. OOPS! The previous remarks are the opinion of a technical college graduate and should not be considered scientific or fact based!
cool thanks, just wanted to be sure.
 

florida joe

Well-Known Member
Wow that’s a pre cocktail question but I would need to know how far your overflow to you destination is if you have any elbows or other changes in direction
 

locoyo386

Member
Hi Joe,
Originally Posted by florida joe
http:///forum/post/2934890
Wow that’s a pre cocktail question but I would need to know how far your overflow to you destination is if you have any elbows or other changes in direction
Well if you have a drilled tank at the battom and the pipe is 1" gravity fead directly straight down for about 10". The other is drilled on the back side on the top also 1" pipe gravity fead (the water level is always at or above the bottom of the hole). Except here there is a 90 degree elbow to a straight down pipe than a 45 degree elbow back to the bottom of the tank. The distancee are about 3" (horizontal pipe to elbow) to 90 degree elbow and about 34" (vertical pipe to 45 degree elbow) straight down to the 45 dgree elbow and about 8" (pipe fron 45 degree elbow to drop off) to drop off.
 

florida joe

Well-Known Member
Originally Posted by locoyo386
http:///forum/post/2937022
Hi Joe,
Well if you have a drilled tank at the battom and the pipe is 1" gravity fead directly straight down for about 10". The other is drilled on the back side on the top also 1" pipe gravity fead (the water level is always at or above the bottom of the hole). Except here there is a 90 degree elbow to a straight down pipe than a 45 degree elbow back to the bottom of the tank. The distancee are about 3" (horizontal pipe to elbow) to 90 degree elbow and about 34" (vertical pipe to 45 degree elbow) straight down to the 45 dgree elbow and about 8" (pipe fron 45 degree elbow to drop off) to drop off.
I believe that vertical (static) head +friction loss head due to pipe + fittings + filters + valves + other restrictions to flow Is going to give you a different GPH then a feed from point a to b with out any restrictions. If this is still a concern I can dig up the info on the restriction of the fittings for you
 

locoyo386

Member
Thanks Joe,
Originally Posted by florida joe
http:///forum/post/2937237
I believe that vertical (static) head +friction loss head due to pipe + fittings + filters + valves + other restrictions to flow Is going to give you a different GPH then a feed from point a to b with out any restrictions. If this is still a concern I can dig up the info on the restriction of the fittings for you
I did not want to take out my fluid mechanics book
, but I might have to.

Well I have to find it first,
.
 
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