Laing Hotsprings SilentFlo

Introduced in 2008 as a premier upgrade circulation pump. The compact size and flexible positioning (can mount on its side or vertical on the sidewall of the equipment compartment) makes it a very versatile little pump.

The new pumps do not have the grounding screw in the rear as the unit now has plastic legs - ground wire can be attached to the leg mounting screw or removed. They are also certified under the CB testing. 

Light and compact, the Laing (Xylem) is specially designed for 24-hour operation.

its body is completely insulated from the motor, without a shaft or metal seal, which minimises water penetration into the motor.

This SilentFlo E5 circ pump replaces all previous versions of single speed and two speed circulation pumps.

• Highly Efficient  Technology
• Long Lasting, Silent Operation
• Scale Build Up Resistance
• Single Bearing 
• Seamless & Shaft-less 

See Associated Documentation

HEAD - H max: 3.35m

FLOW - Q max: 10gpm

Discharge and suction: 3/4-inch barb.

Note, the smooth male wet end barbs have an external diameter of 21 mm that fit into 3/4-inch flexible pipes, held in place with a clamp.

See related products below

The new E5 replaces the Watkins SilentFlo® 5000 and Silentflo 5002 circulation pumps on all Hot Spring and Tiger River spa 

Replaces 74428, 74427

Laing Reference: E5-DSHFDNNW, E5-NSHNNN1W14, E5-NCHNNNN3W-10, E5-NCHNNNNW3W, SM-303-NH, SM303NH-3/4

Other Reference: 74416, 74427, 74415, 34378, 301392, 301392G, 301392E, 34-158-1252, 35181000, 37949, 73491, A-05-280-502, LTI 7060, 10-0127, 10-0102-K, 6080C5031, 70813, 73369, 73588, 72204, 9406, HQ100102

The pump is supplied pre-cabled without plug.

If  replacing an existing pump, you may be able to re-use your existing power cord.

A wiring diagram for connecting it up on the inside of the cover of the electrical box.

Removal of the old circ pump

1. Disconnect power to the spa.
2. Access the equipment compartment.
3. Unplug the circulation pump from the control box.
4. If the spa is filled with water, clamp the circulation pump inlet and outlet tubing with Hose Clamp Pliers or insert wine bottle corks into the ends of the tubing.
5. Remove the bonding wire and base bracket screws.
6. Use pliers to slide the spring clamps located on the inlet and outlet fittings back onto the vinyl tubing.
7. Remove the vinyl tubing from the pump inlet and outlet fittings.

Installation of the new circ pump

1. Reverse steps 3 to 7 of the Circulation Pump Removal instructions.
2. Check for water leaks.
3. Reconnect power to the spa.
4. Perform a water flow test.
5. Check for any air in the plumbing lines. If air does not clear, bleed off the air at the closest tubing clamp.
6. Reinstall the equipment compartment door.