Order today, ship today!

Left for Same-Day Shipping

Free Shipping Offer to Orders over $149

Rain Bird M40X 40 PSI Inline Pressure Regulator 3/4" FPT | PSI-M40X-075

In stock
SKU
PSI-M40X-075
Free Shipping on Orders over $149
Sale Price $14.68
Our Price $22.68
You Save 35%

3/4" 40 PSI Inline Pressure Regulators

Features & Benefits:

  • Can be installed above or below the ground.
  • Preset outlet pressures: 30 psi (2;0 Bars); 40 psi (2;8 Bars); 50 psi (3;5 bars).
  • 3/4" (20/27) or 1" (26/34) female-threaded inlet and outlet.

Operating Range - Flow:

  • PSI-L30X-075: 0.10 to 5.0 GPM; 6 to 300 GPH (23;0 to 1135 l/h)
  • PSI-M30X-075; PSI-M40X-075; PSI-M50X-075: 2.0 to 10.0 GPM; 120 to 600 GPH (454 to 2271 l/h)
  • PSI-M40X-100; PSI-M50X-100: 2.0 to 15.0 GPM; 120 to 900 GPH (454 to 3407 l/h)

Operating Range - Inlet Pressure:

  • PSI-L30X/M30X: 10-150 psi (0;7 to 10;3 bars)
  • PSI-M40X-075/100: 10-150 psi (0;7 to 10;3 bars)
  • PSI-M50X-075/100: 10-150 psi (0;7 to 10;3 bars)

    Note: For inlet pressures that exceed the operating range; specify/install two regulators in series.

Models:

  • PSI-L30X-075: 3/4" 30 psi (2;0 bars) regulator for low flow (red label)
  • PSI-M30X-075: 3/4" 30 psi (2;0 bars) regulator for medium flow (yellow label)
  • PSI-M40X-075: 3/4" 40 psi (2;8 bars) regulator for medium flow (yellow label)
  • PSI-M50X-075: 3/4" 50 psi (3;4 bars) regulator for medium flow (yellow label)
  • PSI-M40X-100: 1" 40 psi (2;8 bars) regulator for medium flow
  • PSI-M50X-100: 1" 50 psi (3;4 bars) regulator for medium flow
 

click to enlarge

 

 
Brand:
Rain Bird
Weight:
0.300000
Color:
Black
Flow Rate:
2 - 20 GPM
Series:
M40X
Type:
Inline Pressure Regulator
Product Type:
Inline Pressure Regulator
Pressure Regulator Size:
3/4"
PSI:
40 PSI
Connection:
FPT
Average Rating:
5 Stars
5.0 / 5.0
1 Review
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
1
0
0
0
0
Works exactly as advertised.
Works exactly as advertised. Reduced my rotators Sprinklers overspray by controlling the water pressure within the working limits of the sprinkler heads.
June 29, 2020
Purchased
1 month ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions Browse 8 questions and 21 answers
Does this regulator go on BEFORE the valve or attached after going through the valve?
Dennis L on Sep 10, 2012
BEST ANSWER: I would use the regulator before the zone valve. Beware if you have very long runs of pipe water hammer can be destructive to everything up stream of the valve as well as the valve itself. I have started using an air chamber or pressure tank (like used on a well pump) as a pressure arrester. Gives a nice smooth valve action and saves the components in the line up stream of the valve from destructive forces.
Is this thing adjustable once installed?
Jimbo on Jun 6, 2015
BEST ANSWER: No. It is preset at 40psi and is not adjustable.
But if your sprinkler heads operate best at 40psi, then this is what you want.

My line pressure was 70psi and my rotator sprinkler heads operate best at 40psi. So this was my solution. Installed just before my automatic sprinkler valve and now heads see only 42psi vs 70psi. head water pattern is now extremely predictable and finally adjustable. too much pressure was my problem.
I'm looking for the Rain Bird PSI-M50X-075 (3/4" connections and 50 psi) but I can't find it on your site. Do you carry it?
Mike G on Aug 5, 2013
Will this item work to reduce water pressure from city 120-110 lbs to a manifold of valves to operate Rainbird 3500 rotary models?
A shopper on Feb 14, 2016
BEST ANSWER: Wow, 120 lbs from the City. That is a lot. I do not know for sure, but in my case it does reduce 90 lbs from the city to 40 lbs measured at the sprinkler riser. I have my regulator immediatley in-line after my valves as my valves have no problem with the 90 lbs but my sprinklers were rated for 40 lbs for proper operation. Hope this helps.
Does this pressure regulator go in line before the valve or after going through the valve?
Dennis L on Sep 10, 2012
BEST ANSWER: I have my regulator immediatley in-line after my valves. Because I have numerous zones, i only use the regulator on the zones that had too high pressure when measured at the sprinlker riser. The lower pressure helped to ensure the sprinklers were watering their intended pattern and coverage area.
Is the water flow affected by installing this or will your GPM remain the same?
Chris on Aug 6, 2018
BEST ANSWER: Well, the reason you install this device is to cut the water pressure coming into your home (usually around 60 - 80 psi) down to only 40 psi since the only watering devices you would connect downstream of this device would be for drip watering systems that require much less water pressure than the normal pressure coming into your home from the street. The gallons per minute and gallons per hour flow through this device are listed in the device's description text under Operating range.
What does it do? Mine is turned tight to keep water from spraying out from under the cap.
James J on Apr 26, 2014
BEST ANSWER: I use it part of my drip system it is meant to bring down the water pressure so your drip system will function properly.
what length is the regulator, also how do you attach it, is it threaded?
AngryGuy A on Sep 13, 2012
BEST ANSWER: I have my regulator immediatley in-line after my valves. It is threadded. It measures 4.25 inches end to end.