Senju Plastic Wrench for Sprinkler Heads

June 13, 2016

Senju Plastic Wrench for Sprinkler Heads

The development of our plastic wrench started because AHJ from some areas in the United States has required homeowners to have a spare sprinkler head wrench in case of an emergency. However, the current price of metal wrenches in the market are too expensive, and therefore having a plastic one handy allows the homeowners to comply with local code/rules while at the same time maintaining affordability. Although the plastic wrench is not recommended for regular installation work, it is very convenient to store it in a cabinet for emergency use.

  • Material: Polybutylene terephthalate (PBT), which is known for its strength, durability, and stable characteristics. PBT is widely used for manufacturing escutcheons in Japan.
  • Shelf life: If the plastic wrench is stored in a shaded place, the shelf life would be long.
  • Strength: These plastic wrenches were tested by installation under 40Nm of torque about 2 -3 times, but no change is detected. It looked as if it was brand new even after rigorous testing.    
  • Our recommendation noted on our data sheet is 7 to 14 ft.lbs (9.5 to 19.0Nm torque (Page 5) on

Estimate availability for sale is July 2016.

Leave a comment

Comments will be approved before showing up.