Grey water question

[MikeP]

This is not what I'd call important, or maybe not even slightly interesting but in doing some plumbing work the past week or so I got to wondering...

Why are there shower sumps? Grey water from the sinks/garbage disposal, the dishwasher, and the washing machine goes straight overboard but showers do not. Why add the complication of a shower sump and pump plumbing when the water ends up in the same place as the rest of the grey water?

I'm sure there's a good technical reason for it...or is there?

[chris piazza]

Mike in mine it's because the drains for both showers are below the water line so it has to be pumped up to go out. Also the sink in the master head is on a interior wall so that also drains down to the shower sump.

Chris
Superior Nights 53C

[GJH]

Mike in mine it's because the drains for both showers are below the water line so it has to be pumped up to go out. Also the sink in the master head is on a interior wall so that also drains down to the shower sump.

Chris
Superior Nights 53C

Exactly.

[captddis]

Mike,
Please tell me you are kidding?

[Pascal]

Long night partying mike? :?

Never post in a forum before morning coffee....

[Angela]

Mike,
Please tell me you are kidding?

That's exactly what I mumbled to myself as I read Mike's post. LOL Well, we all have a brain fart every now and then.

[Canuck Dennis]

Mike's post is perfectly valid, on my 70, the showers are pumped directly overboard, not through a sump, pump discharge has a check valve, nothing wrong with that system, no different than pumping a bilge via bilge pump, plus, no retained odors and less maintenance.

[captddis]

Mike's post is perfectly valid, on my 70, the showers are pumped directly overboard, not through a sump, pump discharge has a check valve, nothing wrong with that system, no different than pumping a bilge via bilge pump, plus, no retained odors and less maintenance.

Mike asked why the shower uses a PUMP when the other discharges do not.
I believe it is called gravity or the plumbing rule that shit travels down hill.
The shower water will NOT run uphill to the discharge.

[Canuck Dennis]

Not sure what pumps you use, mine pump from the sh. drain up 12" and then out, no problems no odors.

[Angela]

Not sure what pumps you use, mine pump from the sh. drain up 12" and then out, no problems no odors.

Now, that IS interesting! What kind of pump to you have? It would seem to me like some sort of "inline" pump rather than one like a bilge pump that is set down and uses a float switch. I wouldn't mind having something like that, but I've never seen one. What is it?????