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Watkins SilentFlo Circulation Pumps

Factory Replacement Circulation Pumps for all Hot Spring, Tiger River & Limelight Spas

Newest factory upgraded replacement circulation

Over the years Watkins Manufacturing has distilled down their dependable circulation pumps to two models. These two models, the new E5 and the Silentflo 5002 were used for all circulation pump replacements in all Hot Spring Spas & Tiger River Spas until now.  In December 2009, Watkins Manufacturing retired the two speed Silentflo 5002 and announced that the new E5 would be its replacement. All pumps come with a (1) year limited warranty from Watkins Manufacturing, the makers of Hot Spring & Tiger River spas.
See our warranty policy. Find with Parts Finder Show compatibility chart Hide compatibility chart

Your factory original circulation pump will look like one of the pictures below
Discontinued Laing 303 Circulation Pump

The First Generation SilentFlo 5000 (Discontinued)
Second Generation SilentFlo 5000 Circulation Pump
Second Generation SilentFlo 5000 Circulation Pump
New for 2008! 3rd Generation Silentflo Circulation Pump
Cal-200 & Cal-500
Laing 303
SilentFlo 5000
SilentFlo 5000
SilentFlo 5002
New for 2008!
Silentflo E5
Discontinued 3-08
Discontinued 12-09
Before Replacing:
If your circ pump isn't moving much (or any) water through the system,
there may be some easy fixes.

Is your heater reset button tripping or your red power light blinking?

The #1 cause of this nuisance is low water flow through the heater. The #1 cause of low water flow is clogged filters. Even if they look clean!
From 1989 forward, all Hot Spring and Tiger River circulation pumps draw water from a single filter. If that filter hasn't been chemically cleaned (recommended every 3 months) then the circ pump may not be able to drink enough water per minute. Once it draws water from the filter it then pushes it out to the heater. A semi-clogged filter causes that water to travel too slowly through the heater resulting in overheating. The heater high-limit (heater reset button) or high-limit thermistor then trips the the heater off (and the jet pump & light on some models) because it thinks you have drained the spa and forgot to power it down. This safety device prevents a melt down (dry fire heater).
To eliminate a clogged filter as the culprit, clean your filter(s) with an approved spa filter degreaser. There are two types of filter cleaners for spa filters, ONLY USE A DEGREASER. The other type of filter cleaner is for removing calcium deposits which is an acid type cleaner that will permanently set up any accumulated lotions, body oils and cosmetics on your spa filter(s) and ruin them! Filters should be replaced every 3-5 years.

Is there any water at all moving through the system?

If your spa has sat dry for any length of time, the circ pump impeller could just be bound up.
We usually just tap on the wet end of the pump (the end where the vinyl tubing is connected) with a screwdriver handle. More times then not, this will un-stick the impeller.

If none of these suggestions help, then the circ pump is most likely worn out.

Circ Pump, E10 Laing (220volt/50HZ-Generic)
Item #: 73588-BYP
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This generic version of the Watkins SilentFlo® 5000 circulation pump which was used from 1995-2008 and was replaced by the new and more efficient E5 Silent Flow. This pump is also is used in countries that require a 50HZ component in 220 volts (Like all European, Australian, New Zealand Hot Spring, Tiger River, Limelight, Hot Spot spa models etc.). This pump is made by the same company that made the Watkins Silentflo 5000.

Voltage: 230

Wattage: 60

Hertz: 50/60


Ref: E10-NSHNDNN2W-01, 6080U0010, Laing, E10 Circ pump, E10-NSHN2W-20, LHB07100138

Price: $239.64
Circ Pump, E5 (Silentflo 5000 & 5002 Factory Replacement)

What's Included:New for 2009-2010 E5 circulation pump replaces the Silent flo 5000 and 5002 E5 Circulation Pump with power cord

Description: This New E5 circ pump!SilentFlo E5 circ pump replaces all previous versions of single speed and two speed circulation pumps.
The new E5 replaces the Watkins SilentFlo® 5000 and all previous circulation pumps on all Hot Spring, Tiger River and Limelight spa models from 1986 to 2018. The E5 was introduced in March of 2008 as the premier upgrade/replacement circulation pump and has had a handful of updated and thoughtful revisions since.  The compact size and flexible positioning (can mount vertically on the sidewall of the equipment compartment) has won it favor with Hot Spring dealers worldwide. Click the "More Info" button for details.

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Restocking Fee Policy:
Price: $227.11
Circ Pump, Watkins SilentFlo 5000

OBSOLETE-Use 74427 OR 73588
The Watkins SilentFlo® 5000 circulation pump was used from 1995-2008 and was replaced by the new and more efficient E5 Silent Flo

Price: Not available
Not Available
Circ Pump, Watkins Silentflo 5002, (2-Speed)


This two speed circulation pump was used on 1995-1996 Hot Spring and Tiger River spa models that operate on 220volts. The second speed feature insured that the water flowing through the original 5500 Cartridge Style Heater would flow fast enough to prevent it from tripping the high limit sensor. Click the "More Info" button for details.

Price: Not available
Not Available
Circulation Pump, Laing, 115V / 230V, E-5, 3/4" Barb

This is the generic version of the new Watkins E5 circulation pump, to purchase the OEM model please order part number 74427

This generic circulation pump has the same measurements as the OEM model, and is used to replace all previous circulation pumps on all Hot Spring, Tiger River and Limelight spa models from 1986 to current. This circulation pump is smaller, lighter, and more efficient than older versions.


Click the "More Info" button for details.

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Restocking Fee Policy:
Price: $195.35
Circulation Pump, Laing, 230V, E-10, 3/4" Barb

Hydro-Quip 10-0121-K-K E-10 Laing Circulation Pump; 240 V, 4 ft Cord, 3/4 Inch Barb

• The only pumps to offer “Smart pump” technology that is programmable without requiring a separate controller… i.e. Dry Run Protection and soft start.

• Built in DRY RUN protection is programmed into the software to help eliminate motor and pump damage if the pump is ran without water when not sufficiently primed or is air locked.

• The E10 is quieter, offering a lower overall db level, than traditional induction pumps, eliminating the 48 frame growl.

• The permanent magnet design allows for the capture of 90% of the heat to be transferred into the water versus being lost to the air in waste.

• The spherical rotor design has no shaft seals to leak or pump shaft to wear.

• The E series pumps seal with captured O-ring design for the best possible seal.

• The unique electronically commutated 230 volt motor is a global design offering the same performance on 60 Hz or 50 Hz power sources reducing the need to inventory two different pumps and motors.

• The E10 weighs less than 4 pounds versus 14 pounds for standard induction pump motors.

Ref: E10-NSHNDNN2W-02

Restocking Fee Policy:
Price: $268.00