Water Pump, Domestic

[bracabric]

Help!! As some of you will know I recently dug out my farm water well a further 5' as it was dry and it was an ideal opportunity, I may in the next few weeks dig it out a further 6' with the aid of a Jack-hammer. The reason being that the 5' extension of depth produced 18" of water and that ain't enough.Well the 1HP suction pump that was inherited when I bought the Farm has finally given out much at the same time as the digging so, I am thinking of installing a submersible pump so as to draw water from the very bottom of the well and not have to worry about suction hose lengths (you can push a long way but only suck so far) (( no vulgarity intended)) I went to one of the local hardware super stores and they have a selection of submersible pumps varying from .3 hp to 1hp the most economical balance seemed to be a .75hp pump the guy there was not the brightest and seemed worried that .75hp would burst the pipes. although the new pump would be pushing a further 21' it would be less powerful than the 1hp suction pump of old.
My question is, the new submersible pump would be pumping (delivering) 50' up from the bottom of the well to the inlet in the water tank on the water tower, maximum, how big a pump (in HP or fractions) would I need? the tank is no more than 150 gallons (US) and speed is not very important and, would this hight put undue strain on standard 32mm (1&1/4") hard wall plastic water pipe with a wall thickness of 2mm (0.08") ?
Any help would be greatly appreciated,

Dick

[FlyHiFlyLo]

I have some devices I can send you as far as controls... Is your tank metal or plastic? Do you have 220VAC or 110VAC near the tank?

[bracabric]

flyhi very kind of you, but really all I need is information, viz, how powerful should the pump be to service a head of 50feet and when a 1hp pump at 30feet produced no problems would the pipe to the tank really be in danger of bursting with a .75hp pump? bearing in mind there is no restriction on the pipe to the tank, it's quite open ended.



I have standard 220 volt available and the tank is plastic
Dick

[FlyHiFlyLo]

You are going to need at least 3/4 HP to make some magic. Don't forget I have a container coming from China late March early April. I can get you a real well pump if you are interested.



This one is solar powered and goes from 10-210 meters. It's kind of wild but I'm sure you could get something less wild... Let me know...

I have switches level switches and weld in bungs.... So having a plastic tank doesn't give you many options as far as auto fill with my stuff. That sucks because I would have given it to you.

[bracabric]

Flyhi, you are very kind and generous,I will go with the .75hp pump then, I'm not to worried about automating things, I just want to fill the tank like I did with the old suction pump.Re your container, again most kind but you would not believe the complexities of Chilean customs!! I was going to ship a Koyker FEL from the states but as I'm not a registered machinery importer I couldn't !! and to register is a long playing nightmare! I am most grateful as I have no experience of submersible pumps, only a few suction ones.
Hope you are having fun with the containers, when I was really busy exporting Antiques from the UK about 7 years ago, I got up to eight 45 footers a month (hi cubes) and that takes some handling (as well as financing), bills of laden and such. Anyway, enjoy and thanks again.
Dick

[FLICK]

Dick
how powerful should the pump be to service a head of 50feet and when a 1hp pump at 30feet produced no problems would the pipe to the tank really be in danger of bursting with a .75hp pump?

50' head of water is about 22psi (150kpa) of pressure, I doubt you'd have any problems with pipes bursting..


Matthew.

Edit: does the pipe have a pressure rating printed on it?

[mariner]

Hi Dick,

You will have no problems with the pipes bursting no matter what size of pump you use, if the end is open! You are dead right about the bloke in the hardware store - matybe 5 watts :-)

Rule of thumb is 15psi for every 34ft water height. As Flick says, you will be at around 15 x 50/34 = 22psi.

I have just a 3/4hp pump on my well and it pumps water to a pressure of 65psi (in my pressure tank) from a depth of 350ft. That is a deep well pump which is different beast.

Anyway, you should be fine with the submersible pump.

mariner

[bracabric]

Mathew and John
Thanks both, I will go with the 3/4hp submersible pump and will check if the pipe has a pressure rating, I didn't think it would be a problem but when someone puts an idea in your head...............
Thanks to everyone who has helped with this

Dick