Installing drain line

[karmakanic]

Originally Posted by Bluestreak

It would be impossible to hook hard piping to these drain stubs. They have an outlet with a little lip on them. I plan on going hard line to within an inch or so of the drain valves and then coupling them with the rubber.

Thanks for the help.

If you leave a 3 or 4" gap between the two hard pipes it makes it a lot easier to replace the rubber coupler some time in the future if you need to do so.

regards,
Dave

[ldm]

In our area, we would extend the 4 inch drain line adjacent to the new machines where we would use an appropriate 4X3 inch fitting (combo or wye usually) leaving a 4 inch clean out at the end of the 4 inch run. Each run would have an appropriate 3X2 inch vent fitting that would vent back to the vent stack in the bulkhead or thru the roof...IF no vent is available, then you could reduce the 2 inch vent pipe to an 1 1/2 inch female fitting at the end of the vent run as high as possible, and screw in a mechanical vent (usually not code)...they won't allow the sewer gas to escape, and will allow the air to vent in so no drain siphon is created. There should be a 3 inch P-Trap fitting at the end of the runs to the wash machine with a riser that comes up in back of the machine centered on the drain, and the final connection can be made with a rubber fitting...have the rubber fitting when you set the trap so you can place it the correct distance from the back of the machine. Les

[Xiong]

anyone know or found what is the best drain slope, on the main line?

[Howard]

The "Best" slope is the maximum that space will allow. In my case I ran the drain line from the floor in the front of my store to the floor in the basement in the back of the store. Thus, it dropped about eight feet over a run of about sixty feet. I never had to clean a line in the twelve years I had the store - gravity did that for me.

[MrMachine]

Originally Posted by Howard

The "Best" slope is the maximum that space will allow. In my case I ran the drain line from the floor in the front of my store to the floor in the basement in the back of the store. Thus, it dropped about eight feet over a run of about sixty feet. I never had to clean a line in the twelve years I had the store - gravity did that for me.

That's an awesome pitch Howard. I can understand how your drains would stay clear.
Are they PVC or No Hub?

[Howard]

They were all 4" PVC with 2" and 3" take-offs connected to each washer. The original piping was 3" and 4" copper that was actually only hung about a foot under the ceiling and actually was sloped the wrong way. I ripped it all out and replaced it all myself and it worked great.

[MrMachine]

Originally Posted by Howard

They were all 4" PVC with 2" and 3" take-offs connected to each washer. The original piping was 3" and 4" copper that was actually only hung about a foot under the ceiling and actually was sloped the wrong way. I ripped it all out and replaced it all myself and it worked great.

Wow...PVC with that kind of slope....the water must have come crashing down to your trap, lol.
PVC is a cinch to work with and doesn't clog easily. I wish they allowed it in NYC.

[ldm]

Originally Posted by Xiong

anyone know or found what is the best drain slope, on the main line?

In our area, they require 1/4 inch per foot minimum slope on branch and main drains. Like Howard said, if you can get more slope, so much the better in most cases. Les

[Howard]

Originally Posted by MrMachine

Wow...PVC with that kind of slope....the water must have come crashing down to your trap, lol.
PVC is a cinch to work with and doesn't clog easily. I wish they allowed it in NYC.

Yea, the water went down so fast that it actually exited the store BEFORE it entered the store

[MrMachine]

Originally Posted by Howard

Yea, the water went down so fast that it actually exited the store BEFORE it entered the store

Howard,

Just think....You could have added a Dynamo with a nice little paddle wheel and got some Hydro-Electric action.