Watts 223S - Manual

Series 223, 223-S
High Capacity Water Pressure
Reducing Valves*
Sizes: 1 ⁄
2
" – 2 1 ⁄
2
" (15 – 65mm)
Series 223 and 223-S High Capacity Water Pressure Reducing
Valves are designed to reduce incoming water pressure to a
sensible level to protect plumbing system components and
reduce water consumption. This series is suitable for water sup-
ply pressures up to 300psi (20.7 bar) and may be adjusted from
25 – 75psi (172 – 517 kPa). The standard setting is 50psi (345
kPa). Series 223 features an enlarged diaphragm, spring cage
and seat orifice for high capacity performance. Series 223-S
has the same options as the 223, except it is furnished with
a strainer. All parts are quickly and easily serviceable without
removing the valve from the line. The optional bypass feature
permits the flow of water back through the valve into the main
when pressures, due to thermal expansion on the outlet side of
the valve, exceed the pressure in the main supply.
Features
• Enlarged diaphragm, spring cage and seat orifice for super
capacity performance
• Bronze body construction (except 2 1 ⁄
2
" (65mm) which is iron)
• Serviceable in line
• Series 223-S furnished with separate strainer
• Optional bypass feature controls thermal expansion pressure**
• Sealed spring cage on all models for accessible outdoor or
pit installations.
Models
223 NPT threaded female inlet x NPT threaded female outlet
223-S NPT threaded female inlet with strainer x NPT threaded
female outlet
For 2 1 ⁄
2
" – 3" (65 – 80mm) bronze threaded valves, refer to
literature ES-N223B.
For 3" (80mm) flanged connections, refer to literature ES-N223F.
Specifications
A Water Pressure Reducing Valve shall be installed on the
water service pipe near its entrance to the building where
supply main pressure exceeds 60psi (413 kPa) to reduce it to
50psi (345 kPa) or lower. Sill cocks and outside wall hydrants
may be left on full main pressure at the option of the owner.
Provision shall be made to permit the bypass flow of water
back through the valve into the main when pressures, due to
thermal expansion on the outlet side of the valve, exceed the
pressure in the main supply. Pressure reducing valves with
built-in bypass check valves and strainer will be acceptable.
Approved valves shall comply with ASSE 1003. Valve shall be
a Watts Series 223 or 223-S (with strainer).
For Commercial, Institutional and Industrial Applications
ES-223
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
Available with or without
separate strainer
223-S
Disc holder removable for replacement of
disc without dismantling the valve —
no special tools required.
Sensitive spring
and large dia-
phragm area for
accurate
pressure control
Bronze body
construction
1 ⁄
2
" – 2"
Replaceable
stainless seat
High temperature
resisting diaphragm
for hot or cold water.
Large stainless steel
perforated strainer screen.
Sealed spring cage
* A water saving test program concluded that reducing the supply pressure from
80-50psi (551-345 kPa) resulted in a water savings of 30%.
** The bypass feature will not prevent the pressure relief valve from opening on
the hot water supply system with pressure above 150psi (10.3 bar).
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
FOR LOCAL INSTALLATION REQUIREMENTS
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.