Watts 288A - Manual

Series 288A
Hot or Cold Water Anti-Siphon
Vacuum Breakers
Sizes: 1 ⁄
4
" - 3" (8-80mm)
Series 288A represents a complete line of vacuum breakers
designed to prevent backsiphonage of contaminated water into
a potable water supply.
They feature a lightweight, durable “disc float” suitable for tem-
peratures up to 180°F (82°C) which closes the atmospheric
vent to prevent spilling under all rates of flow. Therefore, they
are ideally recommended for low flow installations such as lab-
oratory equipment which use such a small amount of water.
They also contain a durable silicone disc which has high heat
and water hammer shock resistance and assures tight seating
with the lightest of seating contact.
Full Size Orifice - Series 288A has a full-size orifice to assure
pipe size capacity. Water passages are streamlined to provide
high water flow with minimal pressure loss.
For bottom/inlet and outlet connection type vacuum breakers
1 ⁄ 4 ", 3 ⁄ 8 " (8, 10mm) size, send for ES-N388.
Features
• Brass Body
• Full size orifice for maximum flow
• Lightweight disc assembly prevents spilling under all rates
of flow
Models
288A 1 /
4
" – 3" (8 – 80mm) with brass body
288A-C 1 /
4
" – 1" (8 – 25mm) with brass body and polished
chrome finish
Specifications
For Anti-Siphon Vacuum Breakers
An atmospheric type anti-siphon vacuum breaker shall be
installed where indicated on the plans to prevent the back-
siphonage of contaminated water. Device shall include light-
weight disc float with silicone disc for tight seating. This device
is not to be used under continuous pressure or where there is
a possibility that a backpressure condition may develop. The
device shall meet the requirements of ASSE Standard 1001,
ANSI A112.1.1 and CSA B64. Watts Regulator Company
Series 288A.
For Health Hazard Applications
ES-288A
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. –––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
1 /
2
" 288A
Center Stem Guide
for accurate seating
Disc has high heat
and water hammer
shock resistance
Disc Float
durable and light-
weight, closes vent
with minimum flow
Full Size Orifice
assures pipe
size capacity
Since atmospheric type vacuum breakers are subject to normal mainte-
nance and replacement, they should be located where emergency water
spillage will create no problem and where they can be accessible for
inspection or servicing.
IMPORTANT NOTE:
This device shall not be subjected to continuous pressure for more than
twelve (12) hours per ASSE Std. 1001. For continuous pressure appli-
cation, specify Watts Series 800 pressure type vacuum breakers.
Vacuum breakers are not designed, tested or approved to protect
against backpressure backflow. For protection against backpressure
backflow, install Watts Series 909 or Series 009 reduced pressure prin-
ciple backflow preventers.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.