I have a approx. 10 year old jacuzzi whirlpool tub with a Rapid heat BT-300 in -line heater and am in need of 2 gaskets (one for each side). Is there a model # or a source where I can get this? The gasket transitions between the stainless of heater and plastic of union nut

SOURCE: Rapid Heat Bath Heater - indicator light on but not heating water

Bathtub heaters will not produce the heat out a the jets like you would feel coming out of a return jet in a swimming pool.
Bathtub heaters will ONLY maintain whatever temperature water you put in there. they only heat 1-2 degrees an hour. that is for a 1500 watt heater. Many heaters today are only 650 watt or perhaps 700 watt.

SOURCE: Need to heat water up more

I had same problem... fixed by turning hot water tank up to 145 degrees...but PLEASE do not do this if you have young children..that is hot and will burn!.. but does work(did this 8 years ago!)

SOURCE: Jacuzzi whirlpool, air on/off button on tub

If it is a air button that pushes in and comes back up, there is a good chance that the switch (which is mounted on the pump/motor) is bad. If the switch is a touch button on a key pad, the problem is in the control box for the pump/motor.

SOURCE: No heat with Rapid Heat U395000 Jacuzzi jetted tub

when you changed the heater did you make sure you also changed out the temp sensor cause most of the time calciun builds up an is the reason for both the heater an sensor to fail calcium is ok at temps above 93.6 degrees but as soon as the temp drops below this point it will come out of solution an start to harden on the element an sensor.Always make sure to that you are getting power from the spa pack to the heater check for voltage at the main leads on the heater just because it says its on does not always mean you are getting power to the heater.Always remember with spas the problem lies where the power dies.sometimes it can even be your main top side controls they can go bad an indicate the heat is on but will not relay that to the heater.make sure you got the correct kilowatt heater also an that you have the correct one in terms of 240v or 110v also from the thousands of heaters i have replaced in spas over the years i always check to see if i am getting the correct omhs reading before i install them should be around 8-10 for a 110 an 12-13 for a 240

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• 719 Answers
• Posted on Sep 06, 2010

SOURCE: How do I ground my rapid heat in-line jacuzzi tub

connect it to one of the copper water lines. that will do the trick