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Brand Website Reviews

Customers browsing the Coates ILS Series In-Line Electric Heater 1.5 kW 1 Phase 120 V product page say this compact in-line spa heater delivers reliable warmth for small hot tubs and spas, with many noting the stainless steel tank and replaceable incoloy/titanium elements help support long-lasting performance and efficient heat transfer without taking up much space. Built-in safety features like a pressure switch and high-temperature limit add peace of mind.

Amazon Review Summary

On Amazon, the Coates 1.5ILS In-Line Electric Spa Heater receives mostly positive mentions for its efficient heating output (~5,120 BTU) and solid construction, with buyers reporting it performs well in smaller spa setups when installed correctly and delivers consistent warmth.

Walmart Review Summary

At Walmart, the listing for the Coates ILS Series 1.5 kW Electric Heater shows positive product info and features, with buyers noting the energy-efficient design, easy integration into existing spa plumbing, and built-in safety pressure switch, though detailed star counts are limited on marketplace listings.

Other Retailer Review Summary

Specialty pool supply sites highlight that the Coates ILS 1.5 kW In-Line Heater heats water effectively for spas under about 400 gallons and is appreciated for its compact size, robust stainless steel construction, replaceable elements, and safety-oriented design that suits residential and light commercial spa use.

Reddit Discussions

In Reddit and spa owner forums, users mention that small inline electric heaters like the Coates ILS 1.5 kW are ideal for boosting spa temperatures quickly and reliably when paired with proper circulation, with community members appreciating manageable installation and consistent performance for regular use.

• Efficient Heating: 1.5 kW power output for consistent and effective water heating.
• Stainless Steel Tank: Corrosion-resistant construction ensures longevity.
• Replaceable Incoloy Elements: Provides durable and efficient heat transfer.
• In-Line Installation: Easy integration with existing spa plumbing.
• Pressure Switch: Prevents operation without water flow for safety.
• High-Temperature Limit: Manual reset function prevents overheating.
• Compact Design: Space-saving structure fits seamlessly into spa systems.
• UL Listed: Certified for safe indoor installation.

• Power Output: 1.5 kW
• Voltage: 120V
• Phase: Single
• Tank Material: Stainless Steel
• Heating Element: Incoloy
• Flow Rate: 15-80 GPM
• Control Box Finish: Powder-Coated
• Application: In-line spa heater for small hot tubs

Q: Is this heater suitable for all spa sizes?
This heater is ideal for small spas and hot tubs, specifically those with a forced water circulation system operating between 15-80 GPM.

Q: What safety features does this heater have?
It includes a built-in pressure switch to prevent dry operation, a manual reset high-temperature limit, and an element "on" light for monitoring.

Q: How easy is the installation process?
With its in-line design and standard 1-1/2 X 2 inch union connections, it integrates easily into existing spa plumbing setups.