Install Instructions

Page 3 of 3Form No.V8525
50-60 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
Figure 2. Testing for internal seat leakage.
upstream
manual
gas cock
leak
test tap
downstream
manual
gas cock
gas supply
downstream
pressure tap
to burner
external leak
test tap option
glass jar
filled with
water
test
petcock
1/4 flex tubing
1/4 aluminum or
copper pilot tubing
1/2
45 cut
FLOW
Figure 1. Provisions for pressure and seat leakage testing.
OUTIN
FLOW
1/8 NPT pipe plug
(3/16 hex key wrench)
Downstream tap & plug on
bottom of valve body for
3/4 NPT construction
Downstream for seat
leakage testing
(lower tap & plug)
Upstream for
pressure testing
(upper tap & plug)
Partial side view of valve body showing location of tapped
and plugged holes for pressure and seat leakage testing
Series SV311 Combustion Valve
To illustrate leakage testing only.
Not for system layout.