Grundfos Pump Advice Needed

[RustyKnuckles]

Many years ago I worked for a solar company and we sold and installed solar hot water systems, not solar electric systems. We used Grundfos pumps exclusively cause they were so well built and lasted so long. So my well pump has been cycling badly for a few years--in my defense this is my first well and for a long time I didn't realize what was happening, but its cycling every 15-18 seconds with the bathroom faucet on 20%. I have ordered a SCV and a small tank to replace my bad pressure tank. My pump is a Sta-Rite pump, and is 15 years old, but for the first 7 years I only used it from May to Oct. Since 2018 I've been using it full time. So I'm thinking the pump could be due to take a dump on me, and I don't want to be surprised, and I don't want to buy whatever pump my local pump guy has in stock.

I have a chance to buy a new Grundfos 10SQ07 200 3/4 h.p. 230VAC single phase pump for a good price.
My well is 170 feet deep and my present pump is set at 160 feet. Static water level is 50 feet. Would this Grundfos pump be adequate for my well?

 

[RustyKnuckles]

My current pump is a Stay Rite, 3/4 hp, 230 VAC pump. I'm thinking the 10SQ07 would work, but I'd like confirmation from a pro before I buy it.

 

[Sponsor]

 

[Valveman]

The 240 would be better. But the 200 will work as long as the water level doesn't get any deeper than about 100'.

 

[RustyKnuckles]

Thanks Valveman.

 

[Reach4]

Note that if the well water level were to drop down more than anticipated, the pump would not be sucking air etc. Instead it would still deliver water at the rate the well can produce to that level.

 

[RustyKnuckles]

I've found a Grundfos 10SQ07-240 for a little over $1,000 including shipping.

My well is 170 feet deep. My present 3/4 hp pump is set at 160 feet. Static water level is 55 feet.

I am a little worried that the pump guys around here might not want to install a pump if I source it myself. I know they like to make $$ on both the labor and pump. So for you pro pump installers, what kind of ball park charges can I expect to pay, to get a local pump guy to pull my present StayRite, install Valveman's CSV in the casing, and also install the Grundfos pump. All opinions welcome. Thanks.

 

[Valveman]

Like you said, most pump installers will not install anything but a pump they supply. But it wouldn't hurt to ask for a quote.

My guess is if you ask for a price for purchasing and installing that SQ from the pump man, he will charge $2,000 for the pump and install it for maybe $200. He could just as easily say he would install the pump you purchased elsewhere for 1200 bucks, but they usually will not. Even if they would, if the price is the same, let him supply the pump, then he also is responsible for any warranty.

 

[Reach4]

One thing to consider and discuss, if the pump person sells you the pump, and it does not work, the pump person pulls the pump and replaces it I presume without charging extra. If you provide the pump, and the pump is the cause of the failure, it is reasonable to expect to pay for the swap.

I suggest you put a flow inducer on your SQ pump. If you want some info on that, say so.