Simplex STS User Manual

7
The overow connection
is a mandatory connec-
tion!
InStallatIon
operatIon
Always connect the Day
Tank to an earth ground
before operating the Day
Tank. Electrical shock can
cause personal injury or
death!
1. Remove the Day Tank top. Check all visible hard-
ware for tightness. Attach the Vent Pipe. is is
an NPT internal connection. e vent pipe allows
equalization of internal Day Tank pressure. DO
NOT INSTALL A VALVE IN THE VENT LINE!
Venting provides pressure relief in case of overll,
rapid expansion, or gasication of contents in
the event of re. e Day Tank may become
permanently distorted at pressures above 5PSI
(10 and 25 gallon) and 3PSI (50–400 gallon) and
may rupture at pressures above the maximum
withstand pressure of 25PSI (10 and 25 gallon)
and 15PSI (50–400 gallon). Day Tank operation
without a vent pipe is strictly not recommended.
e vent pipe should be at least 5 feet higher than
any other pipe and should terminate outdoors.
e vent pipe must be installed per local building
codes and per NFPA 30 including but not limited
to Section 19.5.3. ere should be no low portions
or sags in the vent pipe which can trap liquid. e
end of the pipe should be tted with a 180° weath-
er protected vent cap to shed water and should be
screened to keep out pests, leaves, etc.
2. Attach the Overow Pipe. is is an NPT internal
connection. Simplex recommends the congura-
tion shown in the illustration above. e overow
pipe runs from the Day Tank back to the main
storage tank and allows for draining of the tank
should it become overlled. is pipe should
be sized at least twice the diameter of the pump
ll pipe (minimum 1”I.D. for 10 and 25 gallons;
minimum 2” I.D. for 50-500 gallon). If the tank
becomes overlled and the overow line is not

Simplex STS Specifications

General

Brand	Simplex
Model	STS
Category	Industrial Equipment
Language	English