Coates 6ILS in-line electric spa heater, 6 kW 240 V single phaseCoates 6ILS In-Line Electric Spa Heater, 1 Phase 240 V 6 kW In stock$51299
Coates 6ILS in-line electric spa heater, 6 kW 240 V single phase
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Coates 6ILS In-Line Electric Spa Heater, 1 Phase 240 V 6 kW

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$51299
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Quick overview

  • Compact in-line design Plumbs directly into the circulation line rather than sitting as a separate appliance.
  • Stainless steel tank The heater body is stainless, built for constant contact with treated water.
  • Replaceable titanium elements Elements are titanium and are serviceable, so element failure does not mean a new heater.
  • For spas and hot tubs under 400 gallons Intended for spas and hot tubs with a forced water circulation system holding less than 400 gallons.
  • Single phase 240 V Rated 6 kW at 240 V, one phase, drawing 23 A, so size the circuit and breaker accordingly.
  • Rating varies in the source This unit is also listed as 5.5 kW at 230 V, which reflects the same heater rated at a different supply voltage.
Full description and specifications ↓

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Product details

The Coates 6ILS is an in-line electric heater for spas and hot tubs, rated 6 kW on a single phase 240 V supply with a 23 amp draw. It plumbs into the circulation line rather than standing as a separate piece of equipment.

How it is built

The tank is stainless steel and the heating elements are titanium. Both choices are about living in treated water year after year. The elements are replaceable, which matters over the life of the heater: when an element eventually fails, it is a serviceable repair rather than a reason to buy a new unit.

What it is sized for

Coates intends this heater for spas and hot tubs that have a forced water circulation system and hold less than 400 gallons. It is a spa heater, not a swimming pool heater, and the compact in-line format reflects that.

Electrical and rating

Plan the installation around single phase 240 V and a 23 amp draw, and have the circuit and breaker confirmed by a licensed electrician. Note that this heater appears in the source under two ratings, 6 kW at 240 V and 5.5 kW at 230 V. Electric heater output moves with supply voltage, so those are two ways of describing the same unit.

Specifications
Brand Coates
Manufacturer part number 6ILS
Type In-line electric spa heater
Power 5.5 kW
Heat output 18,772 BTU/hr, by Coates
Electrical 240 V, single phase, 23 A
Water connections 1-1/2 in x 2 in unions for PVC pipe
Dimensions 19-1/2 in long with unions, 15 in without; control box 12 x 6 x 6 in
Shipping weight 10 lb
Heating element Titanium, replaceable
Tank Stainless steel
Controls Close differential thermostat, pressure switch, manual reset high limit, contactor
Listing UL, indoor installation
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What electrical supply does the Coates 6ILS need?
240 V, single phase, 23 A, by Coates's table for the 6ILS. Have an electrician confirm the panel, breaker and conductors before ordering.
What is the Coates 6ILS for?
A spa or hot tub. It is Coates's in-line spa heater, with a stainless steel tank and a replaceable titanium element, and Coates lists it for indoor installation.
Does the Coates 6ILS have a thermostat?
Yes, a close differential thermostat, with a pressure switch and a manual reset high limit.
What controls does the Coates 6ILS have?
A close differential thermostat, a pressure switch, a manual reset high limit and an element on light.
Can the Coates 6ILS be installed outdoors?
Coates lists the ILS for indoor installation only.
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