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chardunne · Oct 27, 2010, 06:14 PM

I have a gravity flow well with 10lbs of pressure to my house. I need to push the water up 16' to service 5 bathrooms. 1" waterline from the well to the house and 3/4" pex pipe throughout the house.Will a 3/4 hp pump with 3-35 gal pressure tanks do the job?

argaiu1017 · Oct 28, 2010, 12:09 AM

Hi,

You would need to purchase booster pump to increase your pressure to 50psi plus the 10psi which equals to 60psi. Got to figure your head which is 16 ft. above your well. In plumbing waters are size by fixture units and your house is at least 42 fixture units w/ 5 bathrooms. Your well to remote outlet is roughly 100-200ft approx. This is just a rough idea or estimate only to give you a start only.

From my sizing you need at least a 1.25" building supply to the house from your pump rather than 1" to service 5 bathrooms and several other fixtures and then you could branch off to fixtures with 3/4 and 1/2".

So to answer your questions to what size pump you would need, would be1HP, 40PSI, 30GPM minimum or 2HP, 50PSI, 50GPM. I would personally recommend the second option to have good pressure throughout the house. THANKS

jlisenbe · Oct 28, 2010, 03:22 AM

Char, if I was you, I'd be calling some businesses that sell and service pumps and get their recommendation. It's always nice to be able to call back and say, "I am using what you recommended" in case it doesn't work the way you want.

Personally, I'm not sure I'd use a booster pump. They are actually made to run without pressure tanks. But again, I'd call a dealer and see what they recommend.

Why use 3 tanks? Buy one 80 gallon tank if you want to, but the key thing will be having a pump that can deliver the volume you need. 5 showers all running at the same time could use 10 to 20 gallons per minute. That's a pretty good load for a pump.

argaiu1017 · Oct 28, 2010, 10:28 PM

Hey chardunne,

Just checking up on the results for the suggestions I posted previously regarding your pump for a 16' rise to 5 bathrooms.

argaiu1017 THANKS

chardunne · Oct 29, 2010, 03:14 AM

An 80 gal tank is not available where I live. The tank shop suggested a 1hp pump with the tanks. I have 115 volt line to feed from. I hope this works.

chardunne · Oct 29, 2010, 03:15 AM

I have a 1" supply already buried to my house. I spoke to a pump shop and they said to put 3 35gal pressure tanks with a 1hp pump in and that should do the job. What do you think?

jlisenbe · Oct 29, 2010, 08:53 AM

NOthing wrong with the three tanks, it's just a lot of unnecessary trouble installing them. Unless you live in the back side of the wilderness, you can get a tank delivered. But that's not a big deal.

Water Pressure Tanks - Bladder Tank

1" feed might be a little small for 5 bathrooms, but I'd try it first and see. If it works, then great. If not, it won't be any more trouble to replace then than now.