Part Number: 7637
Category: Pressure Washer Accessories → Spray Nozzles → Chemical & Soaper Nozzles
Type: PNR 1/4" MNPT 40° 40.0 Brass Soaper Nozzle – Pressure Washer Chemical Spray Nozzle

The PNR Brass Soaper Nozzle (Part #7637) is a genuine OEM chemical spray nozzle designed for applying soaps, detergents, degreasers, disinfectants, and other cleaning solutions through compatible pressure washer systems. Featuring a 40-degree fan spray pattern and a 40.0 orifice, this nozzle delivers high-volume, low-pressure chemical application for efficient coverage on large surfaces while maintaining excellent detergent draw.

Key Features & Benefits

• Genuine PNR brass chemical spray nozzle
• Part Number: 7637
• Designed for low-pressure detergent application
• 40° fan spray pattern for concentrated coverage
• Large 40.0 orifice for higher-flow systems
• 1/4" MNPT connection
• Corrosion-resistant brass construction
• Ideal for soaps, detergents, degreasers, and disinfectants
• Compatible with downstream chemical injector systems
• Excellent for commercial and industrial pressure washers
• OEM-quality construction for long service life

Technical Specifications

Part Number: 7637

Manufacturer: PNR

Product Type: Chemical / Soaper Spray Nozzle

Thread Size: 1/4" MNPT

Spray Pattern: 40°

Orifice Size: 40.0

Nozzle Size: 40.0

Material: Brass

OEM Replacement: Yes

Compatible Applications

Suitable for use with:

• Pressure washer spray wands
• Pressure washer lances
• Downstream chemical injector systems
• High-flow pressure washer systems
• Fleet washing
• Heavy equipment cleaning
• Building exterior cleaning
• Agricultural equipment cleaning
• Industrial maintenance
• Commercial pressure washing

Always verify thread size, nozzle size, and your pressure washer's flow requirements before ordering.

Function of the Soaper Nozzle

The PNR 7637 soaper nozzle helps:

• Apply detergents and cleaning chemicals at low pressure
• Produce a controlled 40° fan spray pattern
• Deliver increased chemical flow for higher-GPM systems
• Improve detergent penetration before pressure rinsing
• Maximize cleaning efficiency while reducing chemical waste

Its 40.0 orifice is ideal for commercial and industrial pressure washer systems that require higher detergent output while maintaining targeted chemical application.

Common Signs Replacement Is Needed

Replace the nozzle if you notice:

• Uneven spray pattern
• Reduced chemical flow
• Worn or enlarged orifice
• Clogged nozzle
• Damaged threads
• Corrosion or physical damage
• Poor detergent application performance

Replacing a worn nozzle restores proper spray coverage and consistent chemical application.

Installation & Service Notes

• Turn off the pressure washer and relieve system pressure before installation.
• Verify compatibility with the 1/4" MNPT connection and 40.0 orifice size.
• Apply thread sealant if recommended by the equipment manufacturer.
• Tighten the nozzle securely without overtightening the brass threads.
• Flush the nozzle thoroughly with clean water after each use to remove detergent residue.
• Inspect the nozzle regularly for wear or blockage.

Important: This nozzle is intended for low-pressure chemical application only and should be used with compatible downstream chemical injector systems or pressure washer soap mode settings. Match the 40.0 orifice to your machine's flow rate for optimum detergent performance.

Maintenance Recommendations

• Rinse the nozzle thoroughly with clean water after every use.
• Inspect the orifice periodically for mineral deposits, debris, or wear.
• Clean clogged nozzles using an approved nozzle cleaning tool—avoid using wire or sharp objects that may enlarge the orifice.
• Store the nozzle in a clean, dry location when not in use.
• Use only genuine OEM replacement nozzles to maintain proper spray pattern, detergent application efficiency, and long service life.