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Most Popular Laing Circ Pump, Series E5, 115v/230v, 3/4"b, W/4ft Cord, Oem [sm-303-nht] Trial Pack [7hH1NgYb]

$37.99 $121.99 -69%

3/4" barb x MPT - Obsolete - replaced with E5 series pumpManf#: SM-303-NHTVolts: 115Inlet x Outlet: Barb x MPTReplaces: 100102 402643 611452 733886902600 733886940602  74427 9026 9406 E5-NSHNNN3W LAISM303NH3/4 LAISM303NHT SM303NH-75 SM303NHTNon-OEM r

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Most Popular Laing Circ Pump, Series E5, 115v/230v, 3/4"b, W/4ft Cord, Oem [sm-303-nht] Trial Pack [7hH1NgYb]

3/4" barb x MPT - Obsolete - replaced with E5 series pump

  • Manf#: SM-303-NHT
  • Volts: 115
  • Inlet x Outlet: Barb x MPT

 

  • 100102 
  • 402643 
  • 611452 
  • 733886902600 
  • 733886940602  
  • 74427 
  • 9026 
  • 9406 
  • E5-NSHNNN3W 
  • LAISM303NH3/4 
  • LAISM303NHT 
  • SM303NH-75 
  • SM303NHT

Non-OEM replacement for all models of Watkins® Silentflo® circulation pumps used in Hot Spring, Tiger River & Limelight spas from 1986 to 2012.

The Laing Series E5 circulation pump is compact and lightweight, less than 5 lbs. It is whisper quiet and highly efficient using only 50 Watts of power. The Laing Series E5 is specifically designed for water circulation and is rated for temperatures up to 140° F and line pressure up to 50 PSI. It is equipped with a high density ceramic bearing ball and a carbon graphite bearing cap that allows for continuous operation. Embedded microprocessor control gives protection against dry run conditions.

Made with 3/4"barb inlet/outlet and equipped with a 4ft power cord. This pump can be used to replace the discontinued Laing SM-303 (E3).

Inlet Outlet Voltage Amperage Gallons Per Minute(GPM)
3/4"barb 3/4"barb 115v/230v 0.58 A 10 GPM

 

Accessory Pump Type Circulation
Manufacturer Laing Thermotech
Pump Model E5
Speed 1 Speed (1-Spd)
Motor Voltage 115v/230v
Drain Plug Location None
Suction Style Center
Suction Connection Type Smooth Barb (sb)
Suction Pipe Size 3/4"
Discharge Style Side
Discharge Connection Type Smooth Barb (sb)
Discharge Pipe Size 3/4"
Motor Amperage/Wattage 50w

What Our Customers Say

January 17, 2026

Absolutely no complaints!

Couldn't be more impressed with this at all, at all, at all.

- Elffin Y..

January 17, 2026

Absolutely no complaints!

This is a quality and a very, very, very sturdy piece of gear.

- Culhwch G..

January 17, 2026

Absolutely no complaints!

A great product for a very, very, very, very great price.

- Caswallon D..

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