overflow standpipe diameter
- Thread starter Infblue
- Start date
A larger tube top with some sort of cage would lessen the cahce of blockage but not increase the flow rate.
the water flows over the edge of the circumference of the stand pipe. By increasing the circumference, you will increase the water flow up to the one inch limit imposed by the bulkhead fitting. A one inch stand pipe will not flow what the bulkhead fitting will due to the air injestion. The larger stand pipe will allow for the escape of the air, allowing more water to flow through the bulkhead fitting.
CHOMPERS;530393; said:
Just thinking (ouch), will the larger pipe cause girgling because of more water flow or let let the air flow back out better?
Dr Joe
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If I were designing an overflow system I wouldn't use a 1" bulkhead. I'd probably use a 2" instead. If you're restricted to a previous installed bulkhead, I'd upgrade the size of the standpipe. Again, I'd choose a 2".
The cage I was trying to describe would probably cut down the sucking noise. I've used a hard plastic garden hose attachment, a black soaker ball. You could also make a hole in a sponge so that it would fit around the top of the standpipe, keeping debris out of the tube.
On my first post, I was thinking more of debris blocking the flow. Wouldn't adding a vent be a better option? It would ALSO eliminate the noise. Just run a T feeding a 90 then run another tube above the level of the standpipe for air. It wouldn't have to be very large. But if you're buying parts, at Home Depot or Lowe's, commercial 2" parts always seems to be much cheaper. You can buy Ts and elbows in 10 packs for this and future build-outs. I think AGA actually sells something close to this. It's a little expensive for what you get though.
I'm assuming that there's some sort of box for all of this. It's not very pretty.
The cage I was trying to describe would probably cut down the sucking noise. I've used a hard plastic garden hose attachment, a black soaker ball. You could also make a hole in a sponge so that it would fit around the top of the standpipe, keeping debris out of the tube.
On my first post, I was thinking more of debris blocking the flow. Wouldn't adding a vent be a better option? It would ALSO eliminate the noise. Just run a T feeding a 90 then run another tube above the level of the standpipe for air. It wouldn't have to be very large. But if you're buying parts, at Home Depot or Lowe's, commercial 2" parts always seems to be much cheaper. You can buy Ts and elbows in 10 packs for this and future build-outs. I think AGA actually sells something close to this. It's a little expensive for what you get though.
I'm assuming that there's some sort of box for all of this. It's not very pretty.
Sorry, if the space is that tight, you'd just have to put a 1 1/2 piece there to see. Don't cut it until you know.
sorry i wasn't clear. i think the overflow box (built-in type) is at least standard size, so a 2" pipe will fit. But since the return pipe is coming back up in the overflow box as well, and i'm gonna put a prefilter sponge over the drain pipe (good idea or not??) i wasn't sure if there's sufficient spacing to allow for a 2" drain pipe.
so will a 1.5" pipe give me the max flow allowed by a 1" bulkhead (this goes back to what chompers was saying)? Or do you think 2" is the minimum size to ensure i'm getting the max flow allowed by the bulkhead? i'm trying to plan for alternatives in case things don't work out as intended, if i can get away with 1.5" i'll go with that, but getting the max flow is my priority. again thanks
so will a 1.5" pipe give me the max flow allowed by a 1" bulkhead (this goes back to what chompers was saying)? Or do you think 2" is the minimum size to ensure i'm getting the max flow allowed by the bulkhead? i'm trying to plan for alternatives in case things don't work out as intended, if i can get away with 1.5" i'll go with that, but getting the max flow is my priority. again thanks
The standard size of standpipe for 1" bulkheads is 1.25". A 1.5" standpipe is pointless when using 1" bulkheads, because the flow is limited by the size of the bulkhead.