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Conbraco 36C-100 25 - 75 PSI Pressure Regulator 1" MPT x Union | CDC36C-105-01

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The Apollo? Model PR ( 36 Series) Pressure Reducing Valves are designed to protect residential and commercial water distribution systems by controlling excessive pressures. The valves are built for long reliable service with proven ASTM grade materials including a bronze body and stainless steel strainer. The PRC is designed to reduce the pressures up to 400 PSI to a more functional level within it adjustment range. The Standard PRC is factory set at 50 psi outlet pressure and is adjustable from 25 to 75 psi.


  • Corrosion Resistant Sealed Body and Bonnet
  • Pressure Gauge Connection Option
  • 100% Factory Tested
  • Integral SS Strainer
  • Balanced Piston Design
  • Internal Thermal Expansion By-Pass
  • Standard Pressure Setting : 50 psi
  • High and Low Pressure Options
  • Multiple Connections Types
  • 100% Manufactured in the USA

Performance Rating

Maximum Supply Pressure up to 300 psi Temperature Range 33 ? F ? 180 ? F Maximun Set Pressure : 125 psi

Material Specifications

Part Name Material
Body, Covers Bronze ASTM B584
Diaphragm FDA Grade Buna with polyester
Seat Disc FDA Grade EPDM
Stem Brass, ASTM B-16
Springs Stainless Steel
O-Rings FDA approved Nitrile


The PRC is designed to reduce the pressures up to 400 PSI to a more functional level within it adjustment range. The Standard PRC is factory set at 50 psi outlet pressure and is adjustable from 25 to 75 psi. To increase the set pressure, loosen the locknut and turn the adjusting screw clockwise. To decrease the set pressure, turn the adjusting screw counterclockwise. Re-tighten the locknut. Allow for some fall-off from the set pressure during flow conditions.


ASSE 1013 - Horizontal (?"-2"), U & Z (?"-1") CSA B.64.4 - Horizontal (?"-2")

Flow Rate:
45 GPM
Inline Pressure Regulator
Product Type:
Inline Pressure Regulator
Pressure Regulator Size:
25 - 75 PSI
MPT x Union
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Browse 5 questions Browse 5 questions and 11 answers
can this work on an outdoor sprinkler system?
A shopper on Feb 5, 2015
BEST ANSWER: Absolutely! That is what I am using mine for. I installed Hunter rotating sprinkler heads and my house pressure, at ~100psi, was WAY too much for them. With the regulator turned down to ~40psi they work fine. There have been no problems with the regulator mounted outside. I'm in Southern California, so no really cold weather; that might be a concern.
I am installing under groung irrigation. I have an above ground pump that will be used for irrigation and house water. What size pump would be adequate for 5 zones and house supply? Would I use a pressure restricted valve?
Michael H on Mar 30, 2015
Can PVC pipe be connected to a bronze pressure regulator?
Chris C on Jun 17, 2016
BEST ANSWER: Yes. I have done this and it is working fine.Use Teflon tape on the threads to prevent leakage. This was done on a pressure regulator from Sprinkler Warehouse.
Will this work on "dirty water" (unfiltered and untreated) for an outdoor sprinkler system?
ken i on Aug 6, 2015
BEST ANSWER: Better to install an upstream filter or use a regulator specifically designed for dirty water applications.
What should be the water pressure for automatic sprinkler valves?
John W on Apr 29, 2015
BEST ANSWER: Pressure is less of an issue than flow. Insufficient flow across the valve will result in partial closing or no closing at all, so pay attention to the lowest flow for which your valve is rated. Irritrol 700 series valves are great for drip systems where many other valves will show leaking through the valve at low flow rates-- that is, they don't fully close. Pressure would be determined by your application. Unless your pressure is unusually high (then check the valve manufacturer's specs on their website) this won't be a problem.