Watts NF8 - Manual

For Health Hazard Applications
ES-8
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. –––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
Series 8
Hose Connection Vacuum
Breakers
Size: 3 ⁄
4
" (20mm) hose thread
Series 8 is a line of unique vacuum breakers specially made to
permit the attachment of portable hoses to hose thread
faucets. Designed to prevent the flow of contaminated water
back into the potable water supply, these devices require no
plumbing changes, and screw directly onto a sill cock.
Series 8 can be used on a wide variety of installations, such as
service sinks, swimming pools, photo developing tanks, laun-
dry tubs, wash racks, dairy barns, marinas and general outside
gardening uses.
Features
• Brass body (all models except 8P)
• Stainless steel working parts for longevity
• Durable rubber diaphragm and disc for
consistent positive seating
Models
8A - Furnished with exclusive “Non-Removable” feature and
standardly equipped to allow sill cock to be drained.
Note: Device should only be installed on approved sill cocks
containing at least four full threads. Non-removable
once installed.
8 - Similar to the 8A except it is furnished without the
“Non-Removable” or draining feature. Secured with Allen
head set screw.
8B - Furnished with break-away set screw to provide a
tamper-resistant installation. Standardly equipped to allow
sill cock to be drained.
NF8 - Especially made for wall and yard hydrants. Permits
manual draining for freezing conditions.
8P - Furnished with exclusive patented “Non-Removable”
feature. Standardly equipped to allow sill cock to be drained.
Constructed of durable, corrosion-resistant, reinforced
thermoplastic. Tamper-proof feature.
8AC, 8C, 8BC or NF8C - Same as above but furnished
with chrome finish.
8FR - With freeze relief feature. Protects the 8FR from freeze
damage.
IMPORTANT NOTE:
Series 8 is tested and certified under ANSI A112.1.3
(ASSE 1011), which precludes use under continuous pressure.
This valve should only be used in areas where spillage of
water will not cause damage.
Inlet Connection: 3 ⁄
4
" (20mm) standard female hose thread
Outlet Connection: 3 ⁄
4
" (20mm) standard male hose thread
Maximum Pressure: 125psi (8.6 bar)
Maximum Temperature: 180°F (82°C)
For backflow preventers for tub and shower hand spray sets,
request literature ES-S8.
Specifications
A hose connection type anti-siphon vacuum breaker shall be
installed where indicated on the plans to prevent the back-
siphonage of contaminated water. This device is not to be
used under continuous pressure or where there is a possibility
that a backpressure condition may develop. This device shall
meet the requirements of ANSI A112.1.3, ASSE Standard
1011. Vacuum breaker shall be a Watts Series 8.
8P
Tamper-Proof Feature
NF8
Permits Manual Drain
8A
Non-Removable Model
8
8FR
8B
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.