Accessories & Ancillaries
Hydropro FRP Tanks: Sizes, Openings & Pressure Rating
Hydropro FRP tanks with polyethylene liner: 7x17 to 63x86 inch, 2.5, 4 and 6 inch openings, 150 psi working pressure. Size table and quote checklist from Watermart.
Hydropro FRP tanks are fibreglass composite vessels with a seamless polyethylene liner for filter media and softeners, supplied in Indonesia by PT Watermart Perkasa in sizes from 7x17 to 63x86 inch (2.3 to 900 gallons). Every model is listed for a maximum working pressure of 150 psi; choose by diameter, height, top/bottom opening, base type and operating temperature.
Updated 12 November 2026: dedicated Hydropro FRP tank page with size, opening and operating-limit tables from the datasheet.
What is a Hydropro FRP tank used for?
A Hydropro FRP (fibreglass reinforced plastic) tank is a pressure vessel for filter media, activated carbon, iron-manganese media or softener resin. The datasheet splits the line into two groups:
| Group | Sizes | Openings | Max. working pressure | Max. operating temperature | Applications in the datasheet |
|---|---|---|---|---|---|
| Poly Glass Vessels, 7–21 in. diameter | 7x17 to 21x62 | 2.5 in. thread (2.5”-8NPSM) or 4 in. thread (4”-8UN); 21x62 tripod also has a 4 in. bottom opening | 150 psi | 120°F (49°C) | Residential/light commercial softening and filtration, portable exchange tanks |
| Composite Vessels, 24–63 in. diameter | 24x72 to 63x86 | 4 in. thread, 6 in. thread or 6 in. flange; top and on some models bottom | 150 psi | 49°C (120°F) threaded inlet; 65°C (150°F) flanged inlet | Commercial/industrial softening and filtration |
Datasheet design parameters: 4:1 safety factor, 600 psi minimum burst, cycle-tested to 100,000 cycles (7–21 in.) and 250,000 cycles (24–63 in.) without leakage. Colours: grey (GR), blue (BL), natural (NA), black (BK). The datasheet lists a five-year factory warranty; terms are confirmed with the quotation.
These FRP tanks are not hydropneumatic pressure tanks for pump cycling; for that duty see Pentair WellMate.
Which Hydropro FRP tank sizes are available? Size table
The size code is diameter x height in inches: 1054 means 10 in. diameter and 54 in. height. All figures below come from the Hydropro FRP Tank datasheet, which states that measurements may change without notice and are for reference only.
7–21 inch diameter (threaded openings; standard, SMC or tripod base)
| Size (in.) | Top opening | Height with base (mm) | Diameter (mm) | Capacity (gal) | Base |
|---|---|---|---|---|---|
| 7x17 | 2.5” | 431 | 185 | 2.3 | Standard |
| 7x35 | 2.5” | 905 | 185 | 5.2 | Standard |
| 7x44 | 2.5” | 1138 | 185 | 6.7 | Standard |
| 8x17 | 2.5” | 431 | 210 | 3.0 | Standard |
| 8x35 | 2.5” | 901 | 210 | 6.6 | Standard |
| 8x44 | 2.5” | 1133 | 210 | 8.7 | Standard |
| 9x35 | 2.5” | 904 | 234 | 8.3 | Standard |
| 9x42 | 2.5” | 1070 | 234 | 10.1 | Standard |
| 9x48 | 2.5” | 1247 | 234 | 11.8 | Standard |
| 10x35 | 2.5” | 908 | 257 | 10.2 | Standard |
| 10x40 | 2.5” | 1020 | 257 | 11.5 | Standard |
| 10x44 | 2.5” | 1138 | 257 | 13.1 | Standard |
| 10x54 | 2.5” | 1389 | 257 | 16.4 | Standard |
| 12x48 | 2.5” | 1229 | 306 | 20.6 | Standard |
| 12x52 | 2.5” | 1327 | 306 | 22.2 | Standard |
| 13x54 | 2.5” | 1366 | 333 | 27.0 | Standard |
| 14x65 | 2.5” or 4” | 1656–1660 | 370 | 38.0 | Standard |
| 16x65 | 2.5” or 4” | 1671–1677 | 409 | 49.0 | Standard |
| 18x65 | 4” | 1693 | 472 | 64.0 | SMC |
| 21x62 | 4” (tripod: 4” top and bottom) | 1705 (SMC) / 2029 (tripod) | 557 | 84.0 | SMC or tripod |
24–63 inch diameter (industrial composite)
| Size (in.) | Top / bottom opening | Height LA (mm) | Diameter (mm) | Capacity (gal) | Base |
|---|---|---|---|---|---|
| 24x72 | 4”-8UN / none or 4”-8UN | 1880–2182 | 613–625 | 119 | SMC or tripod |
| 30x72 | 4”-8UN or 6”-8UN / none, 4”-8UN or 6”-8UN | 1962–2212 | 764–767 | 187 | SMC or tripod |
| 36x72 | 4”-8UN, 6”-8UN or 6” flange / none or same as top | 2042–2275 | 914–917 | 264 | SMC or tripod |
| 42x72 | 4”-8UN or 6” flange / same as top | 2289–2330 | 1073 | 345 | Tripod |
| 48x72 | 6” flange / 6” flange | 2335 | 1226 | 463 | Tripod |
| 63x67 | 6” flange / 6” flange | 2068 | 1626 | 600 | Tripod |
| 63x86 | 6” flange / 6” flange | 2513 | 1626 | 900 | Tripod |
For 24 in. and larger, the datasheet requires flexible connections between hard piping and the tank opening, and a vacuum breaker where negative pressure inside could exceed 127 mmHg (5” Hg).
How do you choose a Hydropro FRP tank size?
- Media or resin volume. Calculate from the bed depth required by the media datasheet, then leave freeboard for backwash expansion.
- Diameter from flow. The cross-section sets the service rate and the backwash flow needed; use the FRP vessel and control valve sizing worksheet or the filter media calculator.
- Opening and valve. 2.5 in. and 4 in. openings must match the control valve and distributor; 6 in. threaded or flanged openings suit large vessels with hub-and-lateral distributors.
- Temperature and pressure. 150 psi applies to all models; 49°C maximum for threaded and 65°C for flanged openings (24–63 in.).
- Installation space. Check height with base, headroom for loading or removing media, and base type (standard, SMC, tripod).
Which accessories are needed with an FRP tank?
- An automatic or manual control valve that matches the opening: see filter and softener control valves.
- Top/bottom distributors or hub-and-lateral: see the distributor section on the FRP tank page.
- Media or resin: filter media, iron and manganese media, activated carbon or ion exchange resin.
- A brine tank for softeners: see brine and FRP tanks.
- Flexible connections and a vacuum breaker for 24 in. and larger vessels, as noted in the datasheet.
What should you send for a quote?
- Required size (for example 1054, 1665, 3672) or a photo of the old tank label.
- Top/bottom opening and thread or flange type, plus the control valve model.
- Media or resin type and volume, service flow and available backwash flow.
- Operating pressure and temperature, base type and colour preference.
- Quantity and delivery location.
Send the data through the Watermart contact page; stock and delivery time are confirmed with the quotation.
FAQ about Hydropro FRP tanks
What do codes such as 1054 or 1665 mean?
The first two digits are the diameter and the last two the height, in inches. A 1054 tank is 10 in. in diameter and 54 in. tall; in the Hydropro datasheet it holds 16.4 gallons with a 2.5 in. top opening.
What is the maximum working pressure of Hydropro FRP tanks?
The datasheet lists 150 psi maximum working pressure for all sizes, with a 4:1 safety factor and 600 psi minimum burst.
What is the maximum temperature?
7–21 in. tanks are listed to 120°F (49°C). 24–63 in. tanks are listed to 49°C with threaded openings and 65°C with flanged openings.
Can Hydropro FRP tanks be used for softeners?
Yes. The datasheet lists softening and filtration for both the residential/light commercial and the commercial/industrial sizes. Choose the size from resin volume, flow and the control valve opening.
How do Hydropro FRP tanks differ from Pentair Structural vessels?
Both are composite vessels for filters and softeners. Pentair Structural specifications are on the FRP tank page; compare sizes, openings, maximum temperature and accessories from each datasheet.
Related products
- FRP tanks: Hydropro and Pentair Structural
- Brine and pressure tanks
- Filter and softener control valves
- Hydropro brand
- Assembled softener or filter systems are handled by our sister company PT Beta Pramesti Asia: beta.co.id