VT Cabin Well Pump

[rpaoness]

Got a new well drilled last week at 1616 Pond Hill Rd., Lunenburg, 05906. Well driller said it's 305 feet deep and had the highest yield the sales guy had seen (he acknowledged he's only been doing this work like 6 months or so) - 50 GPM.

Their advice due to the high yield was to install the pump at about the 150 foot depth.

Necessary design decisions:
Pump HP and flow/pressure rating. This seems to be a very standard home well system and would likely be adequately served by a 1/2 hp pump, and could probably get away with the composite-discharge less heavy duty pump. I'm leaning toward a 3/4 HP, stainless discharge model to be a little more rugged. I think the Old Lyme house has a 1/2 hp pump (I believe I replaced with exactly what was here and had lasted 50 years, and matched wire gauges and the starting capacitor box in the basement). I can't tell if the pump includes a foot valve (check valve) or I need an external one. I also think these have integral intake screens, but I can't quite tell from the pics.
https://www.supplyhouse.com/Red-Lion-Pu ... 230V-Steel
https://s3.amazonaws.com/s3.supplyhouse ... Manual.pdf

Pipe sizing:
Typical residential well service is apparently either 1" or 1-1/4" poly(ethylene? propylene?) pipe to serve the house. 1" appears to be standard. 1 1-4" is probably negligibly more expensive, but a little harder to work with. I could neck down to 1" after entering the house foundation if that's a major hassle.

Expansion tank sizing:
Depending on desired minimum pump cycling time, the Amtrol website selector says I should have at least 32-gallon expansion tank, especially with a "higher" rated 3/4 hp pump. Especially because I may install this before I have the basement closed in/roof on, the non-steel stand seemed appealing. Amtrol advertising says the paint is outdoor rated, so should ok in the weather for a little while (the pump switch is probably not, but I can cover that.)
https://www.supplyhouse.com/Amtrol-WX-2 ... base-Stand

Wire gauge selection:
Pump sheet says 8 amp motor, so it should be OK w/ 12 gauge, even on a 250'-300' total run (probably 100' horizontal, 10' at well head, and 150' down well. Southwire calculator says 2.9% voltage drop. With 3 sets of connections (at pump, well head, and at controller), seems like 10/3 would be safer. https://www.southwire.com/calculator-vdrop

Parts/ordering list:
https://docs.google.com/spreadsheets/d/ ... sp=sharing