Grundfos MQ3 Pumps
4 products
Grundfos MQ3 vibration pump mat 20mm thick
The Grundfos MQ3-45 has been discontinued and is succeeded by the Grundfos SCALA1 3-45, also known as the MQ Successor 3-45. The SCALA1 3-45 is…
The Grundfos MQ3-35 has been discontinued and is succeeded by the Grundfos SCALA1 3-35, also known as the MQ Successor 3-35. The SCALA1 3-35 is…
2 required per pump – 97894516 Length: 600mm Connection Type: Male and Female threaded
Frequently Asked Questions
Quick answers to common questions about the Grundfos MQ3 Pumps. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.
What is a water booster pump?
A water booster pump increases the pressure of an existing water supply to give stronger flow at taps, showers and appliances. It can be a small inline pump fitted to the incoming mains, or a larger pump and tank set that draws from a break tank to feed the whole house. Boosters do not create water – they raise the pressure of the water already coming in.
What is the difference between an inline booster and a tank-and-pump booster?
An inline booster connects straight onto the incoming mains and is limited to 12 litres per minute under UK water regulations – examples include the Salamander HomeBoost and WaterBoost WB-Compact. A tank-and-pump booster, such as the Grundfos Home Booster or DAB Esybox with Esytank, draws from a break tank and can deliver much higher flow rates for larger homes with multiple bathrooms.
What is a variable speed booster pump?
A variable speed booster uses an inverter to adjust pump speed in real time to match demand. It maintains constant pressure as outlets open and close, runs more quietly than a fixed-speed pump and typically saves up to 50 per cent of the energy a fixed-speed equivalent would use. The DAB Esybox, DAB Esybox Mini 3 and Grundfos Scala2 are common variable speed examples.