BLiss tuBs
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Pre-instaLLation
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Galvanized plumbing should be replaced when possible to prevent sediment from damaging the faucet
valves.
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Although it may not be possible in every circumstance, consider running a 2” drain line back to the main
drain. This may substantially reduce the drain time of the bathtub.
6. hot Water heater considerations
The customer’s hot water heater should be assessed during the walk-in tub planning process. For a regular size
tub model such as the B3052 and B3054 models, most Bliss Tubs purchasers have been satisfied with the hot
water delivery from their existing 40 gallon tanks. However, based on the input from several major hot water
heater manufacturers, a 50 gallon water heater is recommended in most circumstances.
In addition to the current heater’s capacity, the heater’s age and location can affect the amount of hot water that
can be delivered to the walk-in tub. As water heaters age, their performance declines. Location of the water
heater relative to the location of the walk-in tub can also have an impact. The further the hot water a run, the more
heat is lost. Re-circulating systems have proven effective in negating this cooling effect.
tank Heaters
For a regular size tub model such as the B3052 and B3054 models, the recommended minimum tank size for
electric or gas tank water heaters is 50 gallons. Normally one can assume a 70% hot water output from any tank
heater. (Tank heater manufacturers can provide specifications and recommendations.) A 70% output should
provide roughly 35 gallons of hot water from a 50 gallon tank with the thermostat set to the industry standard of
120°F.
As a construction industry rule of thumb, the water mixture for a comfortable bath is roughly two-thirds (2/3) hot
water to one-third (1/3) cold water. Since the typical water requirement to fill a regular size Bliss Tub model is
40 to 50 gallons depending on the user’s size, roughly 30 to 35 gallons of hot water will be needed to fully fill an
occupied tub. Refer to the Appendices B1 or B2 beginning on page 23 for the tub model operating capacities.
Note that the BTU rating (for gas heaters) and the wattage (for electric heaters) only have an effect on the
recovery rate of the hot water level for the heater, not the total possible hot water output.
tankless Heaters
Tankless water heaters require special consideration with regards to water flow rate and temperature rise from
the source. When opting for a tankless water heater, both ratings should be as high as possible. Flow rates
vary by heater manufacturer and model. Contact the tank heater manufacturer for exact specifications and
recommendations. On average, the rise needs to be around 70°F. For example, this will take 50°F incoming cold
water and raise it to 120°F hot water output. These two factors should be chosen based on the homeowner’s
budget, current electrical setup, and desired fill time. As a point of reference, Bliss Tubs equips its tubs with
faucets capable of 18 gallons per minute flow rate.
7. electrical (if so equipped)
All electrical work should be done by a licensed professional contractor. Bliss Tubs does not warranty any part
of the installation and is not responsible for any incidental damages due to improper installation.
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Check electrical requirements for tub systems (see Appendix D [page 32]).
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Run appropriate number of dedicated 15 or 20 amp, 110V (not 220V) electrical lines – rating matches load
requirement of the tub being installed.
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Install easily-accessible GFCI outlets (required).
WarninG...
ENSURE THAT ELECTRICAL PREPARATION IS DONE IN CONFORMANCE
WITH FEDERAL, STATE, AND LOCAL CODES.
8. ventilation
Ensure the bathroom has proper ventilation through ductwork or available window(s) in conformance to state and
local codes.
