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4. Pressure Tank
If the water system relies on a conventional pressure tank setup to maintain household
water pressure, Well-Connect recommends sufficient tank capacity to allow a minimum
8-10 minute pump cycle rate when the Well-Connect is running in order to avoid
excessive pump cycling. To achieve this, it is recommended that you have a minimum of
16 gallons of draw down available from the well system for the WCVC-16 model and 28
gallons for the WCVC-24 model. Additional pressure tank capacity may be required to
achieve the minimum draw down volumes. The following chart (Figure 5) gives general
pressure tank capacities, dimensions, and draw down volumes. 60 gallons of tank
capacity for the WCVC-16 and 120 gallons for the WCVC-24 are typical. For exact
specifications of a given tank, contact the tank manufacturer.
*Note* Draw down as expressed in gallons is not equal to the tank capacity expressed in
gallons; draw down is much less. Most homes have a single 20 gallon tank for normal
household usage. Therefore, a larger or additional tank is often necessary to achieve the
desired draw down volume.
If additional tanks are added, they should be located as close to the existing tank as
possible and connected with large diameter tubing (1" at least, and greater if the tanks are
more than a couple feet apart). If there is too much pressure drop in the line between the
tanks, they won't fill evenly and the available drawdown volume may be greatly reduced.
Tank
Dimensions (in.)
Volume
Gallons
Diameter
7.6
11
10.3
15
14.0
15
14.0
15
20.0
15
26.0
15
32.0
15
34.0
22
44.0
22
62.0
22
86.0
26
119
26
Figure 5
Draw down
(Gallons)
Height
30/50psi
22
2.4
18
3.2
22
4.3
25
4.3
32
6.2
39
8.0
47
9.9
30
10.5
36
13.6
47
19.2
47
26.6
62
36.8
11
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