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43/4 hp flint & walling submersible pumps water well pumps and related accessories

a Denver Winpump Company





The drain back valve in the tee placed in the drop pipe in the well below frost level, allows the water to drain back to the well. The snifter valve allows air into the line to allow the water to drain back to the well.

Your water line is always empty, when it has drained back. Each time you turn the pump on, the line is full of air, and the air volume control, installed into the tank bung half way up the tank side,  allows the excess air to escape from the tank prior to pressurizing.

Many homes in the mountains have very shallow bury depths, and therefore need to drain the water line back to the well to prevent freezing the line from the well to the home.

​​​1/4" x 3" Lead Free Brass Nipple
​ * Select From Drop Down

$  4.29     BUY ON-LINE

Supply Line In # 5   >>>>> 






FSG 2 Pressure Switch
20/40 Pressure Setting
30/50 Pressure Setting
40/60 Pressure Setting​
$ 22.59    BUY ON-LINE


Deep Well Air Volume Control

Noryl Thermoplastic Body w / Brass

Operating Parts $ 33.31   BUY ON-LINE


PO75BNL 3/4" Brass Bleeder Valve Only NL

(For Use In # 8) 
$9.95 each 

1" Drain Back tank fittings kit contains a 1" Galvanized steel tee with a 1" x 3/4" reducing bushing, and a 3/4" brass drain back valve, to install in the well below frost level. This keeps the water from freezing between the well and the home.
The fittings to plumb your water line into the tank are a 1" 2 hole check valve. This has both an 1/8" and a 1/4" hole. The 1/8" hole is for the 1/8" snifter valve, which will allow air into the water line, so the water will drain back to the well. The 1/4" hole in the check valve is for the 1/4" x 4" galvanized nipple the 20 to 40 psi pressure switch installs onto. The 2 hole check valve is connected to a 1" x 3" galvanized nipple, which is threaded into a 1-1/4" x 1" hex bushing, which threads into the hole near the bottom of the standard pressure tank. In some cases, you may have a larger than 1-1/4" hole at the tank, in which case, you will need to get another bushing to connect to the tank.
The hole in the side of the pressure tank, about half way up is where you install the air volume control. The air volume control has a hole that allow the air to escape as the pump pushes it in. When the water lifts the float on the air volume control, it closes the hole and then the water pressurizes to 40 psi to switch the pump off. There is a 1/4" brass 90 degree street elbow installed into the hole on the air volume control, and a 100 psi pressure gauge is threaded into the tee.

drain back pressure tanks and accessories

SN18LNL 1/8" Air Valve No Lead 
$  2.99

SN25LNL 1/4" Air Valve No Lead

$  3.25     BUY ON-LINE

2"  1/4" Base Mount Pressure Gauge
100PG 100#
$ 9.00

200PG 200#
$ 9.00

# 5

1" x 4" Brass Nipple   $  14.51    BUY ON-LINE

1-1/4" X 1" Brass Bushing  $  10.73    BUY ON-LINE

Nipple and Bushing Connect Check Valve To The Pressure Tank

 Galvanized Pressure Tank 

Deep Well Air Volume Control

Zinc Die Cast Body w / Brass

Rod & Plastic Float (Gauges Sold Separately)     $ 45.07  BUY ON-LINE

<<<<< Air Volume Control
​Connects Here

# 8

Brass Tee & Bleeder Valve - Installed in your drop pipe down the well below your frost line and includes:

1" Brass Tee, 1" x 3/4" Brass Bushing and Bleeder Valve - $  31.63    BUY ON-LINE


1-1/4" Tee, 1-1/4" x 3/4" Brass Bushing and Bleeder Valve​ - $  42.51    BUY ON-LINE

Remove Cap ​For
​Proper Operation

1" Lead Free Brass Dbl.Tapped Check Valve

  * Select From Drop Down
$  23.75   BUY ON-LINE

>>>>> Supply Line To Your
​House Connects Here


The drain back tank fittings are designed for use with galvanized standard type pressure tanks. These tanks are used where the well water line will freeze if not drained. The drain back fitting kit allows the water to drain back into the well from the home to prevent the water line from freezing. The 2 hole check valve at the standard pressure tank, has a snifter valve, similar to a valve stem on you car tire.