Grundfos® Stainless UP(s)
Choosing a stainless steel circulator ensures that
you will always have the right pump - whether it
is an open or closed system. Grundfos offers three
stainless steel models, including two that feature
our 3-speed SuperBrute technology.
 • Perfect for hot water recirculation applications
• Stainless steel – Protects against corrosive fluids
• Available in standard union or two-bolt flange
• 3-speed SuperBrute technology available
• Timer and line-cord options available
• Integrated, removable check valve
• Quick connect terminals – for easy installation
• Highest starting torque in its class
• Industry leading three-year warranty
New Home Construction
This system requires a dedicated return-line to be installed from the
end of the hot water supply line back to the water heater. A circulator
pump is used to circulate water through the main hot water line and
the return-line back to the water heater to keep hot water in the main
line. A timer, aquastat, or both may be used to control the operation
of the pump.
Features and Benefits
- Bronze and stainless steel models are available to resist the corrosive effects of fresh water.
- Timer models conserve energy since they can be set for desired operating times during the day.
- Line cord models provide convenience to the installer because no pre-wire of the pump is required.
- Models are available with built-in check valves to prevent back flow.
- Aquastats can be incorporated into the circulator for additional savings.
- The circulator will operate only when the temperature of the water is below the set point.
Models are available with the following configurations:
- Bronze housings with 1/2” and 3/4” sweat (B5 and B7).
- Stainless steel housings with union threaded connections (SU).
- Stainless steel with flange connections (SF).
- Integrated check valve inside the union discharge on a sweat pump housing
(BUC5 and BUC7).
- Built-in 6 ft. , 115 volt ac line cord with a NEMA 3-prong male plug (LC).
- Built-in line cord and 24-hour programmable timer (TLC).
General Overview:
A wet rotor circulator pump is designed to be smaller and more efficient than standard pumps. Standard pumps use a mechanical seal to connect the motor to the “water moving side.” A wet rotor circulator pump does not have this type of connection (coupling) since all the rotating parts are totally immersed in water by means of a stainless steel barrier (canister) that isolates these rotating parts from the motor. The water keeps the circulator lubricated and running cool. Since there is no
mechanical seal, there are fewer moving parts that might fail and cause the pump to leak. Grundfos® Pumps has developed several wet rotor circulator pump models to meet the needs of domestic hot water recirculation systems.
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