Watts 912HP - Manual

Installation Instructions
The 912HP is designed for use in non-health hazard con-
tinuous pressure applications and provides protection
against backpressure and backsiphonage backflow.
• Can be installed horizontally or vertically, flow-up or
flow-down.
• Prior to installation, flush the pipe lines to remove foreign
material.
• Clean the strainer every six months or as conditions require.
• Some discharge from the vent is expected especially during
start-up until all seating surfaces seal. Continuous discharge
is an indication that the check valve components may require
cleaning.
• Quick closing valves, water hammer or supply pressure
fluctuations can cause intermittent discharge. The installation
of a water hammer arrestor (Watts Series 05) or water pres-
sure reducing valve (Watts N35B) may be required to correct
the problem.
• It is important not to install the valve where discharge can
cause damage. Pipe the discharge line in accordance with
local code requirements. A physical air gap must be main-
tained between the discharge pipe and the drain. Create the
air gap by cutting the pipe on a 45 bevel, at a distance of 12"
(300mm) above the floor drain or through an air gap piped to
a floor drain. Under no circumstances should the vent open-
ing or drain line be plugged.
• Inquire with governing authorities for local installation
requirements.
Repair Kit Information
RK912HP-T Ordering Code# 0886008
Kit includes
Diaphragm Assembly, Disc Assembly, Seat, Seat O-Ring, and
Two Union Seats
Series 912HP
High Pressure Hose Drop Backflow Preventer
Sizes: 3 ⁄
4
", 1" (20, 25mm)
May also be installed vertically
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
FOR LOCAL INSTALLATION REQUIREMENTS
Typical Installation
IS-912HP
12"
ES-912HP 0845 EFP# 1915248 © Watts, 2008
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca Wa t e r S a f e t y & F l o w C o n t r o l P r o d u c t s
Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of
original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER
WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental,
special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs
resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company
has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above
limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to
determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.