Jacuzzi J-345
Quick answer
The Jacuzzi J-345 holds about 370 gallons of water and measures 84 x 84 x 36 inches, seating up to 6. Full of water and people it weighs roughly 5,021 lb.
- Water volume370 gal
- TypeHard-shell
- Dimensions (in)84 x 84 x 36
- Seats6
- Water weight3,086 lb
- Empty weight825 lb
Chemical doses for about 370 gallons
Computed for this tub's water volume, so you can dose without doing the arithmetic. Amounts are ounces by weight.
| To do this | Chemical | Amount |
|---|---|---|
| Raise total alkalinity +10 ppm | sodium bicarbonate | 0.89 oz |
| Raise free chlorine +3 ppm | dichlor granules | 0.26 oz |
| Raise bromine +3 ppm | bromine granules | 0.25 oz |
| Chlorine shock (+10 ppm) | dichlor | 0.88 oz |
Open the dosing calculator for this tub
Add in small steps with the pump running, wait, then retest before adding more. Never mix chemicals together, and always follow your product label, which wins over any calculator.
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How much does a full J-345 weigh?
Empty, the JacuzziJ-345 weighs about 825 lb. Its 370 gallons of water add about 3,086 lb, and 6 bathers add roughly 1,110 lb more, for a loaded total near 5,021 lb. Make sure your deck or pad is rated for it. Work out any tub on the filled weight calculator.
Keep the water right
A 370 gallon tub doses in small amounts, so a kitchen scale and small additions beat eyeballing it. Test, balance alkalinity then pH then sanitizer, and use the dosing calculator sized for this tub. Start with test strips and a chemical kit.
Source
The 370 gallon figure is from the manufacturer's published specification: jacuzzipartners.com. Manufacturer handbook. Average fill 370 gal; full spa volume 460 gal. Seats 5-6. Capacities vary with how high you fill and with seats and footwell; confirm against your own manual or a metered fill when precision matters.