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osubuckeye88 02-01-2014 11:01 PM

Need Help on Well Pressure Tank Layout
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I really need help right away on the layout of this well pressure tank and switch. Once I began work to install a new shut-off valve and drain valve, I noticed the layout of this system is different than the pressure tank manufacturer illustrates ( and different than any other layout I have found online). Can anyone please tell me if this layout is acceptable?

It seems that the pressure switch may be affected because the pressure tank has just one line in. In other words, it outflows back through the pressure switch on its way to the house plumbing.

I guess in short, I am asking:
Does it matter where the switch is?
Does it matter if pressure tank outflow is back to main well pipe?

SeniorSitizen 02-02-2014 12:12 AM

There are cross fittings made just for your application.

osubuckeye88 02-02-2014 12:51 AM

So your answer is: this is incorrect?

SeniorSitizen 02-02-2014 05:46 AM


Originally Posted by osubuckeye88 (Post 1300363)
So your answer is: this is incorrect?

No that isn't my answer. What I can tell by your drawing you have the same thing. All I'm saying is there are fittings made for your application if you care to use one.

A portion of the text in your post is obscured by a big two story house on the right and it looks as if no one is going to move it so that portion didn't really help me understand your mission.

Daniel Holzman 02-02-2014 07:08 AM

The simplest way to install the pressure tank is to purchase a well-T fitting, which is the fitting discussed by previous poster. This is typically a brass fitting that incorporates a port for the pressure gage, a drain, and a line to the pressure tank. See this website for full discussion of the theory and installation of fittings:

The pressure gage simply tells your pump when to turn on and off, so in principle it could be located anywhere on the line near your pressure tank. The pressure tank is normally only connected by a single line to the main, at least that is how it is on my system. Very little water flows into and out of the tank, it's primary purpose is to maintain pressure in the system to reduce the number of pump cycles.

ben's plumbing 02-02-2014 07:14 AM

with the cross or tee fitting can install the gauge,pressure switch, and drain in one ....looks better and imo its will work better... why.... that was the way it was set up from the start....ben sr:thumbsup:

joed 02-02-2014 12:10 PM

The pressure throughout the system should fairly consistent. I don't think it matters where on the system the tank or the switch is. Your should be fine.

Bondo 02-02-2014 12:29 PM


I guess in short, I am asking:
Does it matter where the switch is?
Does it matter if pressure tank outflow is back to main well pipe?
Ayuh,... as it is in yer drawin' is just Fine,...

The pressure tank can't feed back into the well, as there should be a check valve in the pump, or a foot-valve if it's a jet-pump,...

So long as the switch can see the pressure in the system, it'll work,....
Regardless where it is in the system,...

'n the placement of the pressure tank, is generally near the pump, but isn't necessarily necessary either,...

My system has the tank, 'n pressure switch at the wellhead, 'n another tank in the house,...
Since I added the in-house pressure tank, the house pressure is much more consistent, as the entire system feeds an office, a shop, 'n 2 apartments in the house,...

Alan 02-02-2014 12:37 PM

Pressure tank is just a vessel to store pressurized water. It doesn't really matter where on the system it is installed, although generally we install everything together for ease of service.

As for the switch, the only problem that is created by the location of the pressure switch would be a difference in pressure based on elevation.

IE : If your house is 40 feet above your well, and you place your 40/60 switch at the well, your switch will see 40/60 psi, but your house will see (roughly) 20/40 psi.

Again, generally we place all of these things close together so that everything is easily serviced.

osubuckeye88 02-02-2014 11:06 PM

Thanks everyone who told me that this configuration is okay. I appreciate it. And I got it all put together in time to see the Super Bowl.

Just some additional information for anyone who is researching this topic:

The pressure switch was wired with the ground wires cut short ( not connected). When I re-plumbed the system, I was able to secure the ground wires to the grounding screws on the pressure switch base. Also, no drain valve was ever installed on this system so when I drained it, I had no choice but to cut the pipe releasing all the reserve water from the tank all over the bathroom. I wish someone had told me some way to avoid this when I was asking for advice before I began the job. So I am passing along the experience to others. I installed a drain valve - maybe not in the ideal location but it will allow most of the tank water to be drained after the pipes are drained.

joecaption 02-02-2014 11:37 PM

Where's the pressure gauge?

Going to have to do something with those wires.

osubuckeye88 02-03-2014 12:14 AM

I decided not to install the pressure gauge. Instead I will use my water pressure test gauge which can screw onto the hose drain, if I ever need to test pressure. What did you mean about the wires? Did you just mean at the entry into the switch box?

joed 02-03-2014 07:38 AM

Pressure switch should have the cable going into the switch and clamped. You should not have the exposed conductors between the staple and the switch.
I would have put the pressure gauge back. It is always nice to just look at the tank and know what pressure is in it.

Alan 02-03-2014 09:11 AM

What about a pressure relief valve?

osubuckeye88 02-03-2014 12:28 PM

Joed: Yes , it would be nice to have a gauge but I can screw on my test gauge if I ever need to. I just dont want to squeeze another threaded assembly between all these joints.

Alan: A Pressure relief valve on a well tank? Do you mean the drain valve?

By the way, all of this work is improvement upon what was there. It never had a gauge, and the switch wasn't even grounded when I bought the house. At least I was able to connect the ground wires, even though I had to strip off a bit more insulation. I will tape the exposed conductors but it is still much safer than it was a week ago.

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