Shurflo water pump 12V 100 PSI male ports

Shurflo water pump 12V 100 PSI 8000-946-138 with male ports

The Shurflo 8000-946-138 is a professional-grade 12V diaphragm water pump engineered for the demands of pure water window cleaning systems in the UK. Known for its reliability and durability, this workhorse is the most popular pump among window cleaners for water-fed pole applications.

Power and performance you can trust

High pressure: Delivers a maximum pressure of 100 PSI, providing the powerful flow needed for effective window cleaning, even at height.

Consistent flow: Achieves an open flow rate of approximately 5.2 litres per minute (LPM), making it ideal for single-pole systems.

Energy efficient: Runs on a 12V DC power supply and draws just 6–8 amps, extending the life of your leisure battery during a busy workday.

Self-priming: The pump is self-priming and can run dry for extended periods without sustaining damage, a crucial feature for professional use.

Built for UK professionals

Durable construction: A rugged diaphragm design ensures a long service life, even with daily use in a professional setting.

Versatile use: Suitable for both hot and cold water window cleaning setups.

Wide compatibility: The 1/2" male NPT ports allow for easy integration into existing water-fed pole systems.

Warranty information: Backed by a 3 months manufacturer's warranty for peace of mind. Note that warranty do not cover damage from frost or water ingress, so always take proper precautions.

Protect the life of your pump

• For maximum performance and longevity, it is highly recommended to pair the Shurflo water pump with a Variflo digital flow controller. This gives you precise control over your water usage and eases the load on the pump's pressure switch.
• Provide suitable inlet filtration to prevent resin and debris from flowing back into the pump when changing the resin. This means that a strainer is essential.
• Protect the pump's electrics and outer casing from water. See the pump cap.
• Do not remove the end plate as this contains the motor brushes.
• If your Shurflo water pump is being used for window cleaning (pure water system), It is often better to bypass the pressure switch altogether using a Variflo controller. Flow controllers regulate the current to the pump, giving smoother operation and preventing switch failure altogether.

If you are having problems with a Shurflo water pump, we are happy to help you fix it.

Compatible fittings

The Shurflo 8000-946-138 water pump features 1/2-inch Male NPT (National Pipe Tapered) ports, which is the key specification for selecting compatible fittings. The most common and recommended connectors for this pump are the genuine Shurflo fittings, which come in both straight and elbow configurations. 

Genuine Shurflo fittings

These fittings are specifically designed for the pump's 1/2-inch NPT male ports and are often the most reliable option for preventing leaks. 

1/2" NPT female to 1/2" hose barb: This is a standard fitting that screws directly onto the pump's ports. The barbed end is designed to connect securely to a 1/2-inch internal diameter (ID) hose.

Wing nut connections: Many Shurflo fittings feature a large black wing nut that can be tightened by hand, ensuring a secure and tool-free connection. The internal cone seals the water, so the threads are only for securing the fitting. Straight or elbow? Choose straight fittings for simple inline connections or elbows to route your hose at a 90-degree angle, which can be useful for optimising space. 

Strainers: A strainer is a critical component for protecting your pump from debris. The recommended option is a Shurflo strainer that includes the correct 1/2-inch wing nut fitting to connect seamlessly to the pump's inlet port.

Third-party and adapter fittings

While genuine fittings are recommended, other options exist. Many window cleaners use third-party nylon fittings that are compatible with the 1/2-inch NPT male ports, like the hozelock type Tap adaptor 3/4" and 1/2" (ref:3435).

Ensure your professional setup is reliable and powerful—do not wait, invest in the trusted performance of a Shurflo water pump today.