Select Page


Comet P40/20 Triple Diaphragm Pump with Gearbox – 6158.0003.00


SKU: C-6158000300 Categories: , ,


Comet P40/20 Triple Diaphragm Pump with Gearbox – 6158.0003.00

On Backorder until September

Comet P40/20 Series Triple Diaphragm Pump. Replaces ZETA 40 Udor pumps, plastic, or plastic coated diaphragm pumps. The P40 is a newer, upgraded version of the popular and best-selling Diaphragm Pump, the P36GR.

The P40/20 Comet Diaphragm Pump comes with a Gearbox equipped to clean roofs and surfaces with low pressure impact and halts the growth of algae, mold, & mildew on the roof. This is the best Soft Wash Gas Diaphragm Pump you can get. If you want a complete system of this pump – mounted on a 6.5 HP Honda GX200, please see P40-GR-CBP.

Ideal for cleaning roofs and surfaces with a water and chemical mixture that cannot handle the high pressure impact. This pump cleans algae, mold, & mildew off roofs, siding, & sidewalks makes cleaning more efficient.

Pump Features

  • Chemical Resistant Wet Parts Compatible with Aggressive Soft Wash Chemicals
  • Single Piece Manifold For Reduced Leak Points & Quick Service
  • Increased Flow and Pressure (11 GPM @ 300 PSI)
  • Molded Inserts That Cannot Come Loose
  • Bolt-On Regulator To Prevent Leaks When Adjusting Pressure Knob
  • Aluminum Head Plates To Prevent Flexing of the Heads
  • Metal Oil Cup For Impact Resistance
  • Ideal Application: Professional Soft Washing (Mold, Bacteria, Mildew, Moss, Fungus, Algae)
  • 30.4 fl oz Oil Capacity
  • Estimated 30 lbs

Pump Specifications

Max GPM 11.5
Max PSI 290
Max rated speed (RPM) 550
Max fluid temperature (F) 140 F
Diaphragms 3 (Viton)
Materials Polypropylene / Stainless Steel


P40 Breakdown

P40 Sales Sheet

P40 Data Sheet

SKU: C-6158000300


There are no reviews yet.

Be the first to review “Comet P40/20 Triple Diaphragm Pump with Gearbox – 6158.0003.00”

Your email address will not be published. Required fields are marked *

four × 1 =

Customer Questions & Answers

  1. Q Any objections to pairing this with a 6.5hp machine such as the predator? answer now
    Asked by Joel Mulchansingh on May 11, 2021 9:37 pm
    A that would be a good combination.

Send me a notification for each new answer.

Prop 65 Warning!

This product can expose you to chemicals which are known to the State of California to cause cancer.