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All the parts you will need to Repair an RP/DC-501 or an RP/DC-500 Assembly are listed below. With the modular design these backflows do not require much in order to service or repair any device. The three main Components you need to service an A.R.I. Backflow are the #1 Check Valve, #2 Check Valve and the Relief Assembly, it should take less than 5-6 mins to properly service any model and size.

Take your time, double check everything, enjoy the ease of use and Good Luck Out There!
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#1 Inlet Check Module (1/2"-1") RP-500/501 #1 Inlet Check Module (1/2"-1") RP-500/501

Our Price: $55.00
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#1 Inlet Check Module (1/2"-1") DC-500/501 #1 Inlet Check Module (1/2"-1") DC-500/501

Our Price: $40.00
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#2 Outlet Check Module (1/2" - 1") RP/DC-500/501 #2 Outlet Check Module (1/2" - 1") RP/DC-500/501

Our Price: $55.00
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#1 Inlet Check Module (1 1/4"-2") RP-500/501 #1 Inlet Check Module (1 1/4"-2") RP-500/501

Our Price: $68.50
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#1 Inlet Check Module (1 1/4"-2") DC-500/501 #1 Inlet Check Module (1 1/4"-2") DC-500/501

Our Price: $56.00
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#2 Outlet Check Module (1 1/4"-2") RP-500/501 #2 Outlet Check Module (1 1/4"-2") RP-500/501

Our Price: $68.50
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Relief Valve Assembly w/ Spring (1/2" - 1") RP-500/501 Relief Valve Assembly w/ Spring (1/2" - 1") RP-500/501

Our Price: $78.00
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Relief Valve Assembly w/ Spring (1 1/4" - 2") RP-500 Relief Valve Assembly w/ Spring (1 1/4" - 2") RP-500

Our Price: $90.00
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Complete Rubber Repair Kit (1/2" - 1") RP-500/501 Complete Rubber Repair Kit (1/2" - 1") RP-500/501

Our Price: $48.50
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Complete Rubber Repair Kit (1 1/4" - 2") RP-500/501 Complete Rubber Repair Kit (1 1/4" - 2") RP-500/501

Our Price: $58.50
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Relief Valve Rubber Kit (1/2"- 1") RP-500/501 Relief Valve Rubber Kit (1/2"- 1") RP-500/501

Our Price: $28.00
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Relief Valve Rubber Kit (1 1/4"- 2") RP-500/501 Relief Valve Rubber Kit (1 1/4"- 2") RP-500/501

Our Price: $36.00
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Retainer (1/2" - 1") RP/DC-500/501 Retainer (1/2" - 1") RP/DC-500/501

Our Price: $20.00
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Drainage Funnel (1/2" - 1") RP-500/501 Drainage Funnel (1/2" - 1") RP-500/501

Our Price: $28.00
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Clamp Assembly RP/DC-501 (3/4" - 1") Clamp Assembly RP/DC-501 (3/4" - 1")

Our Price: $30.00
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Cover Assembly (1 1/4"- 2") RP-500/501 Cover Assembly (1 1/4"- 2") RP-500/501

Our Price: $75.00
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1/8" Thd Test Cock (1/2" - 1") RP/DC-500/501 1/8" Thd Test Cock (1/2" - 1") RP/DC-500/501

Our Price: $25.00
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A.R.I. 1" Nylon Composite (Inlet) Shut Off Valve A.R.I. 1" Nylon Composite (Inlet) Shut Off Valve

Our Price: $40.00
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Clamp Assembly (1 1/4" - 2") RP/DC-501 Clamp Assembly (1 1/4" - 2") RP/DC-501

Our Price: $36.00
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A.R.I. 1" Nylon Composite (Outlet) Shut Off Valve A.R.I. 1" Nylon Composite (Outlet) Shut Off Valve

Our Price: $35.00
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