Install Instructions

ManualsBrandsWatts ManualsBackflow PreventersSecond Check Kit, 3/4" - 1" (RK 909-CK2)

RP/IS-909S

• Installation • Service

• Repair Kits • Maintenance

For field testing procedure, send for IS-TK-DP/DL,

IS-TK-9A, IS-TK-99E and IS-TK-99D.

For troubleshooting guide, send for S-TSG.

For other repair kits and service parts, send for

PL-RP-BPD.

For technical assistance, contact your local Watts

representative on back page.

Series 909

Reduced Pressure

Zone Backflow Preventers

Sizes:

/4" – 2" (20 – 50mm)

No. 909QT-S 1

⁄2" shown

Patent Number 4,241,752

IMPORTANT: Inquire with governing authorities for local instal-

lation requirements.

NOTE: For Australia and New Zealand, line strainers should be

installed between the upstream shutoff valve and the inlet of

the backflow preventer.

Its important that this device be tested periodically in

compliance with local codes, but at least once per year

or more as service conditions warrant. If installed on a

fire sprinkler system, all mechanical checks, such as

alarm checks and backflow preventers, should be flow

tested and inspected internally in accordance with NFPA

13 and NFPA 25.

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.

RP-IS-909S.indd 1 9/29/08 1:01:05 PM

Summary of content (8 pages)

PAGE 1
RP/IS-909S Series 909 Reduced Pressure Zone Backflow Preventers Sizes: 3/4" – 2" (20 – 50mm) • Installation • Repair Kits • Service • Maintenance For field testing procedure, send for IS-TK-DP/DL, IS-TK-9A, IS-TK-99E and IS-TK-99D. For troubleshooting guide, send for S-TSG. For other repair kits and service parts, send for PL-RP-BPD. For technical assistance, contact your local Watts representative on back page. No.
PAGE 2
Basic Installation Instructions First Check 909QT Relief Valve Second Check Watts 3⁄4" – 2" (20-50mm) 909QT High Capacity Relief Series: Location and Installation Considerations 1. Backflow preventers must be installed in high-visibility locations in order to allow for immediate notice of telltale discharge or other malfunction. This location should also facilitate testing and servicing, and protect against freezing and vandalism. 2.
PAGE 3
Installation Indoors ASSE approved for vertical installation 3⁄4" – 2" ﬂow up and down 909QT-S ▼ ▼ Min. 41⁄2" For indoor installations, it is important that the valve be easily accessible to facilitate testing and servicing. Series 909 may be installed either vertically or horizontally. If it is located in a line close to wall, be sure the test cocks are easily accessible.
PAGE 4
Test Procedure for Reduced Pressure Assembly A. All needle valves must be closed on test kit. B. Open test cock No. 4 and flush test cocks Nos. 1, 2 and 3 on reduced pressure assembly then close test cock No. 4. C. Attach hoses as shown. Bleed air from kit, close No. 2 shutoff. Bleed Valve A High (red) Bleed Valve B Bypass (yellow) Low (blue) No. 2 shutoff 909QT shown Test No. 1 - Check Valve No.2 Purpose: To test check valve No. 2 for tightness against reverse flow.
PAGE 5
Servicing First and Second Check Valves 3/4" to 2" (20 to 50mm) Note: No special tools required to service Series 909 Relief Valve Service Parts Kit Cover First Check Service Parts Kit Cover O-ring Second Check Service Parts Kit Body 1. Remove the four screws holding the first check valve cover. 2. Lift off the first check valve cover. The check valve inside will come out with the cover and is attached with a bayonet type locking arrangement. 3.
PAGE 6
Servicing the Relief Valve 3/4" to 2" 1. Remove the four bolts that hold the relief valve cover in place. 2. Remove the cover. The stainless steel adapter, with o-ring attached will be free to be removed simultaneous with the removal of the cover. Pull out the relief valve assembly. Note: the spring tension in the relief valve assembly is contained in the design of the relief valve; therefore, the relief can be removed in a one-piece spool-type assembly. 3.
PAGE 7
Troubleshooting Guide - Backflow Preventers Problem Cause A. Valve spits periodically from the vent. A.1 Fluctuating supply pressure. A.2 Fluctuating downstream pressure. B. Solution A.1 Install a soft seated check valve immediately upstream of the device. (Watts 3⁄4" - 2" (20-50mm) No. 601 bronze valve.) A.2 Install a soft seated check valve downstream of the device close as possible to the shutoff valve. (Watts 3⁄4" - 2" (20-50mm) No. 601 bronze valve.) Valve drips continually from the vent B.
PAGE 8
Wa t e r S a f e t y & F l o w C o n t ro l P ro d u c t s RP/IS-909S 0829 USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.