Our Universal Flow Thru Elements will replace 99% of flow thru elements in the hot tub industry. Will fit Balboa (including Balboa M7), Hydroquip, Gecko and the vast majority of other flow thru heater housings. 

The exact size and shape of the element does not matter, but you should compare the measurements of our element with your heater housing. The element should sit completely inside the stainless steel heater housing and not protrude into the plumbing. Terminals are always 1-1/4" apart on flow thru elements.

Select your heater element choice from the list above:

• 4 kW, 240V  Incoloy (nickel alloy) - p/n: 25-4041-BI - (1 kW when wired to 120V)
• 5.5 kW, 240V Incoloy (nickel alloy) - p/n: 25-4034-BI - (1.4 kW when wired to 120V)

Titanium Elements are highly recommended for long life:

• 4 kW, 240V Titanium - p/n: 25-4041BI-TI - (1 kW when wired to 120V)
• 5.5 kW, 240V Titanium - p/n: 25-4034BI-TI - (1.4 kW when wired to 120V)

Why chose a Titanium Hot Tub Heater Element?

Poor water chemistry is damaging to heater elements.

Corrosion is the etching and rusting effect that happens to ferrous metals. If the pH of your spa water is not balanced or if it is overly chlorinated, corrosion is accelerated. Titanium is not a coating and is non ferrous. Titanium will withstand greater chemical punishment, without the pitting, etching, or surface breakdown of typical nickel alloys and even coated elements.

Tap water high in lime, calcium or salt, also corodes elements.

Lime and calcium can naturally collect on the element’s surface and form a white scale coating. This insulating layer will slow heat transfer, resulting in lower efficiency, longer run periods and a higher internal temperature. This buildup will not let heat escape efficiently, and in time the element will over-heat and fail. Tap water that is high in salt, will also quickly corode typical nickel alloy elements.

Titanium is the answer!

Titanium is the solution to heater longevity, and is the best defense against chemical and mineral abuse. Even with today’s salt sanitizing systems, there is no other material that improves heater longevity like titanium.

Titanium doesn’t allow scale to attach to the surface. Titanium naturally produces a dioxide film that continually migrates to the surface and detaches harmful content. Further, titanium’s surface pores do not open when heated, and will not allow harmful particles to collect.

Titanium contains no iron and therefore will not rust or corrode. Given the most adverse water conditions, titanium can resist pitting, oxidizing, and surface breakdown, up to 10 times better than typical nickel alloy elements. Titanum is not magnetic and will not attract materials that can attach and promote deterioration. Last, titanium has a low thermal expansion rate and this will reduce the stress that can cause structural fatigue and fracture.

Titanium is your best defense against common hot tub water problems. Titanium is substantially better than traditional nickel alloy elements, and still much better than Tefel coated or other Teflon coated heater elements.

It is still a good idea to use a spa water pre-filter when filling up your hot tub. Simply attach the pre-filter to the end of your garden hose and filter your tap water as you fill your hot tub. This will help pro-long the life of all your spa parts, will reduce the amount of spa chemicals your require, and provide a healthier spa experience.