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DIG 20 PSI Preset Pressure Regulator 3/4" FPT | 18-020

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Prset Pressure Regulator - 18-020

Reduces incoming water pressure to the ideal working pressure for a drip system.

  • Exceptional control of outlet pressure
  • Withstands severe water hammer
  • Utilize a minimum of moving parts and a diaphragm design that regulates itself in reaction to overall system back pressure.
  • Available with 3/4" female or male outlet
  • Engineered with extra thick industrial strength ABS plastic with all joints sonic welded into a tamper proof and impact resistant housing
  • Install above grade (or below grade in a valve box), downstream from the system valve
  • Flow rate from .5 to 12 GPM
  • Pressure range: 20, 25, 30, 35 & 40 PSI
  • Max. recommended flow rate: 12 GPM
  • Maximum working pressure range: 150 PSI
  • Body: chemical resistant ABS plastic
  • Diaphragm: EPDM
  • Spring: stainless steel
  • Inlet 3/4" FIPT (standard)
  • Outlet 3/4" FIPT or 3/4" MNPT or 3/4" Hose Thread
  • Overall length 4.025"
  • Outside diameter 1.845"
Size (in.):
20 PSI
Flow Rate:
.5 - 12 GPM
Inline Pressure Regulator
Product Type:
Inline Pressure Regulator
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Browse 5 questions Browse 5 questions and 14 answers
Why did you choose this?
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It prevents overpressure to drippers.
Francesco P on May 17, 2012
It prevents overpressure to drippers.
Francesco P on May 17, 2012
I am running four 4-gal. an hour drippers on one line. Will a 20 psi regulator be enough or should I go to a 30 psi regulator?
James T on May 17, 2012
BEST ANSWER: The best way to find out answer to this question is to use trial and error. The unit is relatively inexpensive and if it does not work you can go to a higher pressure outlet. The reason I am saying this, is that to find the actual answer there is a need for more information and even with that we need to use a lot of physics and math to get the answer.
Have a drip timer, should Backflow be placed above or below the timer in line from bib hose faucet?
LoranC on Feb 17, 2016
I don't think it would really matter. Back flow would only be doing it's job when water is flowing.
Only reason I can think of to put it after timer, is to relieve pressure on the back flow device when the timer is in the closed position. Water>pressure>timer> back flow> instead of water>pressure>back flow>timer>
Hope this helps,
Which way does the water flow, male to female or the other way?
Bob W on Aug 30, 2012
BEST ANSWER: There is an arrow on the housing indicating the direction of water flow. If you don't have one in hand, zoom in on the picture and you can see the arrow below the part number. Looks to be toward the male end of the regulator.
This appears to be pipe threads, not hose threads. Do you have one with hose threads?
A shopper on Aug 16, 2014
BEST ANSWER: It is 3/4 inch pipe threads. I haven't seen one with hose threads, but I did find pipe thread to hose adapters at the local hardware store (Ace or TrueValue, I couldn't find it at Home Depot). Hope this helps.