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JOATMON

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Ok...so here is my challenge:

Question 1: Do I even need a Booster Pump? - I'm attempting to install a drain pipe and I only have a 5" drop (no pitch) over a 74" run. Basically it will act as a long P-Trap. My rise pipe from bottom of floor to male end of sink drain is 22" and my rise 74" away from sink from floor to outlet is 17". I don't have any pitch room for my 74" run as I am between a concrete base floor and an elevated wood floor with only 1 1/2" height.

Question 2: In the likely event I will need a booster/sump pump, is an under counter direct connect pump better than a pump in a tank or is the tank option the better way to go. I'm leaning towards the pump in the tank option.

Question 3: Should either pump option be my solution, I would need a side outlet discharge that 90's downward towards the floor. My application is not a upward discharge so my concern is that the head pressure will be too great for a side discharge that will run horizontally about 8" and then 90 elbow downward towards floor another approx. 14" (depending on height of side discharge) then 90's again to run a level 74" (between concrete floor and wood floor) to another 90 elbow which runs up about 17" to 90 elbow into a properly pitched drain pipe stubbed through side wall under counter. So total in all I will have (4) 90 elbows in a level 74" run with roughly a 5" elevation drop from sink drain to drain pipe opening.

Any help in the above would be greatly appreciated!!!!
 

JOATMON

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Thanks for responding. Just so that I'm understanding....1.5" drop have to happen over the length of the 74" run or just so long as there is a drop it can occur at the connection points?

If you're saying I don't need a booster pump, then the 74" level length of run will technically act as the bottom of the "P-trap". Would you advise I comeup with a way of being able to access this run in the future for clean out and maintenance? I'm presuming there would be a build up of muck that would settle in the horizontal drain pipe over time which could restrict the flow causing slow draining????
 

havasu

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Just so everyone is on the same page, I would recommend taking and posting pictures or drawings exactly what you are attempting to accomplish so the professionals could help you correctly.
 

JOATMON

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Are there any experts that would know how to resolve this draining challenge? Again, I have fixed obstacles that I am dealing with and can't be moved. I know draining the sink is a possibility but looking to the experts for recommendations. I'd rather reduce the amount of time on the "trial and error" period as much as possible.
 

JG plumbing

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What would be your work around? The installation of a undersink pump assist?
Yes.Or you could move the sink which would be best, but you still need a vent. So get a pump, but it needs to be pulled different than you have drawn.
 

JOATMON

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Yes.Or you could move the sink which would be best, but you still need a vent. So get a pump, but it needs to be pulled different than you have drawn.
I already have a vent in line with the drain pipe that I'm connecting to. My only option is to pump sideways, then down. Do you recommend I use a pump in a tank?
 
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