First World Third Bathroom Problems...

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flyguy

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Hi folks! I'm new here, and have done some reading, but am now more confused than I was when I got here...

I have a newer home (2008) that was initially built with 2.5 baths. One full bath has a standard tub/shower plus toilet and vanity, the master bath has 2 standard shower heads plus toilet plus double vanity, and the half is a standard toilet plus vanity. Other fixtures are a few hose bibs, kitchen sink, and laundry tub + washer.

When we bought the home a couple of years back, we finished the basement (kitchen sink + tub/shower, vanity and toilet) as well as built a barn, which is also fed by a 2" well pipe off of the main branch of the house. The barn has a couple of hose bibs and will ultimately have a shower stall, toilet and vanity when I get it finished.

The well system consists of a 3/4hp submersible pump (well record shows depth is 181' with water starting at 100', test rate of 21gpm drew down 60 feet in 2 hours, and shows a sustainable yield of 16gpm). The pump runs into a 20 gallon pressure tank (switch appears to be set at 40/70), then into a hydrogen peroxide injection system, then into the softener, and on to the main line.

OK - now the problem. There just isn't enough water pressure to power all three showers in the house at once. If all three are going, water is to a trickle at the kitchen sink. When I bring the bath in the barn online, it will only be that much worse (that said, all four baths will probably never be used at the same time). I fully realize the system probably wasn't sized to accommodate all this - just not sure what to do about it. I have looked into constant pressure pump systems, cycle stop valves, and now am questioning if I need a larger pump. I am not afraid of plumbing/electrical work at all, and would prefer to do this right, even if it means spending some money. What I'm after is enough pressure to run three showers (remember 4 heads, as the master has two) plus a kitchen sink at once without noticing significant drop in pressure.

Any thoughts/suggestions would be greatly appreciated!
 

VAWellDriller

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You need a bigger pump...a 3/4 HP will at most deliver 8-10gpm at the drawdown you specify. If your pump test is right, I would put in a 1.5HP 15 gpm series pump, set at 160', and CSV; which will deliver about double what you have now.
 

flyguy

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Thank you so much for the prompt reply. I was afraid of that. I took the numbers directly off the well log from the well drilling company. Should I be able to trust those?
 

flyguy

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You should also check your water treatment system to see if it will not be bottlenecking flow.
Thanks for the suggestion. If I look at specs for the heads on those units and they are above 15gpm, is that sufficient or is there an actual test I can do?
 

Cacher_Chick

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Thanks for the suggestion. If I look at specs for the heads on those units and they are above 15gpm, is that sufficient or is there an actual test I can do?

That is good. I see people tie in their softeners with flex pipe or use PEX that has a much smaller I.D., particularly in the fittings.
 

flyguy

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That is good. I see people tie in their softeners with flex pipe or use PEX that has a much smaller I.D., particularly in the fittings.
Thank you. Makes sense. Everything is 3/4 pex, but not sure of ID of the fittings. I’ll look at that more closely.
 
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