Toro 1" (2.5 cm) Pressure Vacuum Breaker (PVB) (53300) Installation and User's Guide
Contents
1. Installation Instructions TORO 3 4 PVB Models 220 03 and 220 13 80 0550 pre 1993 1 PVB Models 220 04 220 14 and 220 54 80 0560 pre 1993 1 PVB Model 53300 Notice to Installer This device must not be installed indoors The Toro PVB Pressure Vacuum Breaker is designed to prevent backflow of contaminated water into the potable water system due to back siphoning conditions only This device should not be installed indoors or where backflow due to back pressure may occur Installation of this device should conform to local building and plumb ing codes as they apply Refer to the Installation Requirements on page 2 prior to installing this device Introduction The Toro Model PVB is comprised of a positive seating check valve a spring loaded vent float assembly located down stream of the check valve quarter turn ball valves on the inlet and outlet ports and test cocks located upstream and downstream of the check valve The vent float assembly is spring loaded to the open position and will allow air to enter the system when line pressure drops to 1 PSI 07 kg cm or below thus preventing back siphoning This feature permits installation of irrigation control valves downstream of the PVB Recommended operating pressure range is 25 150 PSI 1 75 10 6 kg cm Figure 1 For Outdoor Installation Only NOTE TO INSTALLER PVB devices MUST BE installed outdoors All2. PVB units must be installed according to local codes and are NOT APPROVED for indoor installation i e basement or garage Line 12 30 5cm minimum PRI e STEN Control T ra EL TEE Installation Requirements The following list of installation requirements is provided to assure maximum performance of the Toro PVB Read this list completely prior to installation m The installed height of the PVB when measured at the Critical Level line must be at least 12 30 5cm above the highest downstream water outlet sprinkler hose bib etc Refer to Figure 1 for location of the Critical Level line m Provide an accessible location for periodic inspection and testing of the PVB cal Level line Install the PVB vertically with the top of the device in a level position Do not install the PVB in a valve box below ground level Do not install the PVB indoors or in an area where some water spillage is harmful Do not install the PVB until the water supply line has been flushed of foreign material Do not over tighten inlet and outlet caps hand tight is sufficient Do not use the PVB with fertilizer injection Caution Do not allow the PVB to freeze or be subjected to downstream water hammer effect Thermal water expansion and excessive pressure situations can cause severe damage to the PVB and the irrigation system Cauti
3. on Use teflon tape for sealing threaded connections Use of other sealing com pounds may cause thread deterioration Servicing Float and Check Valves The PVB must not be subject to standing water which can rise to less than 6 from the Criti Refer to Figure 2 Figure 2 1 Turn off water supply to PVB at source 2 Remove three cover screws 1 and cover 2 3 Unscrew cap 3 counterclockwise 4 Remove o ring 4 float assembly 5 amp 6 check valve spring 7 and check valve assembly 8 11 5 Disassemble check valve assembly by removing phillips screw 11 6 Clean and inspect all components thoroughly prior to reassembly 7 Reassemble in reverse order utilizing new parts as needed Note For float assembly replacement parts order service kit number 89 6006 Kit includes items 3 6 Note For check valve assembly replacement parts order service kit number 80 0553 Kit includes items 8 11 1997 THE TORO COMPANY Irrigation Division An ISO 9001 Certified Facility Printing Date PO Box 489 June 1997 Rev E Riverside CA 92502 Printed in U S A Form No 363 0030
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