Watts DET-5-M1 Installation Instructions
DET-5-M1
DET-12-M1 DET-20-M1
Order No.
Order No.
Order No.
Description 0067700
0067701
0067702
Max. Pressure - psi
150
150
150
Max. Temp. - °F
200
200
200
Tank Volume - gal.
2.1
4.5
8.5
Tank Acceptance - gal.
.85
1.8
3.4
Air Pre-charge - psi
20
20
20
Connections Size - in.
3
⁄
4
male
3
⁄
4
male
3
⁄
4
male
Diameter - in.
8
1
⁄
2
10 12
1
⁄
2
Length - in.
11
1
⁄
2
15 19
3
⁄
16
Weight - lbs.
7
10
15
Models: DET-5-M1, DET-12-M1, DET-20-M1
Potable Hot Water Expansion Tank
Installation Instructions
Certified to ANSI/NSF 61
(73°F/23°C)
Listed by IAPMO
Acceptance Volume
Air Side
Water Side Volume at 150psi
Pre-pressure
(10.3 bar) (gallons)
(psi) (bar) DET-5-M1
DET-12-M1
DET-20-M1
20 (1.4) 1.500
2.801
7.102
40 (2.8) 1.272
2.208
5.882
60 (4.1) .996
2.076
4.705
80 (5.5) .720
1.716
4.009
Figure 1
(Optional Location)
Support Tank
in Optional
Horizontal
Position
(Optional Location)
Watts
Pressure
Gauge
Watts
Backflow Preventer
Water
Supply
Watts
Shutoff
Valve
Watts Pressure
Reducing Valve
Expansion
Tank
Water
Heater
To System
Watts
T&P
Safety
Relief
Valve
Floor Drain
Discharge Line
IS-DET-M1
!
W A R N I N G !
Improper installation, adjustment, alteration, service or maintenance can cause property dam-
age, serious bodily injury or death. Read instructions completely before proceeding with instal-
lation. Only qualified personnel may install or service this equipment in accordance with local
codes and ordinances.
Do not exceed 80psi (5.5 bar) air charge. Air charge pressure exceeding 80psi (5.5 bar) could
become hazardous and will void any and all warranties, either written or implied. Failure to fol-
low these instructions will result in the possibility of property damage, serious bodily injury
or death.
This Expansion Tank is designed and intended for water storage at a maximum pressure of
150psi (10.3 bar) and a maximum temperature of 200°F (93ºC). Any use other than for potable
water or a sustained or instantaneous pressure in excess of 150psi (10.3 bar) or 200°F (93ºC)
is UNSAFE and can cause property damage, serious bodily injury or result in death.
Disclaimer: The manufacturer of this tank does not accept any liability or other responsibility for
personal injury or property damage resulting from improper use, installation or operation of this tank
or the system of which it is a part.
Notice: The expansion tank, piping and your connections may in time leak. Select a location
to install the expansion tank where a water leak will not damage the surrounding area. The manu-
facturer is not responsible for any water damage in connection with this expansion tank.