---
title: "FRP Vessel Size Chart: 844 to 4872, Volume and Flow | Filtsap"
description: "FRP pressure vessel sizes from 0844 to 4872 with diameter, height, volume and filtration flow. How to read a vessel code and pick the right size for a sand, carbon or softener filter."
source: https://www.filtsap.com/guides/frp-vessel-size-chart/
updated: 2026-10-23
---

Buyer guide · Updated 23 Oct 2026 · By the Filtsap technical team

# FRP vessel size chart: sizes, volume and flow rate

**Short answer** An FRP vessel code is diameter then height in inches: a 1465 vessel is 14 inches across and 65 inches tall. Gross volume runs from about 36 litres for an 0844 to about 2,100 litres for a 4872. For a sand or carbon filter at 10 m/h, a 1465 handles about 1 m³/hr, a 2472 about 3 m³/hr and a 4872 about 12 m³/hr.

## How to read an FRP vessel code

The four digits are diameter and height in inches. **1054**  means 10 inches in diameter and 54 inches high. **2472**  means 24 inches by 72 inches. Larger vessels sometimes add a letter for the opening, for example 4" top and bottom openings on industrial sizes.

## Size chart

Volumes are the gross internal volume of the cylinder, calculated from the nominal size. Usable media volume is lower because you leave freeboard for backwash. Flow is at a filtration velocity of 10 m/h, a typical design figure for pressure sand and multimedia filters.

| Vessel | Diameter × height | Gross volume (approx.) | Filter area | Flow at 10 m/h |
| --- | --- | --- | --- | --- |
| 0844 | 8" × 44" | 36 L | 0.032 m² | 0.3 m³/hr |
| 1035 | 10" × 35" | 45 L | 0.051 m² | 0.5 m³/hr |
| 1054 | 10" × 54" | 69 L | 0.051 m² | 0.5 m³/hr |
| 1252 | 12" × 52" | 96 L | 0.073 m² | 0.7 m³/hr |
| 1354 | 13" × 54" | 117 L | 0.086 m² | 0.9 m³/hr |
| 1465 | 14" × 65" | 164 L | 0.099 m² | 1.0 m³/hr |
| 1665 | 16" × 65" | 214 L | 0.130 m² | 1.3 m³/hr |
| 1865 | 18" × 65" | 271 L | 0.164 m² | 1.6 m³/hr |
| 2162 | 21" × 62" | 352 L | 0.223 m² | 2.2 m³/hr |
| 2472 | 24" × 72" | 534 L | 0.292 m² | 2.9 m³/hr |
| 3072 | 30" × 72" | 834 L | 0.456 m² | 4.6 m³/hr |
| 3672 | 36" × 72" | 1,201 L | 0.657 m² | 6.6 m³/hr |
| 4272 | 42" × 72" | 1,635 L | 0.894 m² | 8.9 m³/hr |
| 4872 | 48" × 72" | 2,135 L | 1.167 m² | 11.7 m³/hr |

**Quick sizing:**  use the [pressure filter sizing calculator](https://www.filtsap.com/tools/pressure-filter-sizing-calculator/)  or the [water softener calculator](https://www.filtsap.com/tools/water-softener-calculator/) .

## Picking a size

- **Sand and multimedia filters:**  size on area. Divide your flow in m³/hr by 10 to get the area you need, then pick the vessel with at least that area. Use 8 m/h for dirtier water.
- **Activated carbon filters:**  size on contact time as well as area. Carbon needs roughly 5 to 10 minutes of empty-bed contact time for chlorine and organics, so the vessel is usually taller or one size larger than a sand filter for the same flow.
- **Softeners:**  size on resin volume. Work out the hardness load per day, divide by the resin's capacity, and pick a vessel that holds that resin with about 30 to 50 percent freeboard.

For flows above about 12 m³/hr, use two vessels in parallel or a mild steel rubber-lined vessel. We supply [FRP pressure, filter and softener vessels](https://www.filtsap.com/supply/pressure-vessels/)  with distributors and [multiport valves](https://www.filtsap.com/supply/water-treatment-spares/) , and build complete [sand, carbon and softener filters](https://www.filtsap.com/build/water-treatment-systems/) .

## FAQs

What does 1054 mean on an FRP vessel?

It is the size in inches: 10 inches in diameter and 54 inches high.

How much water can a 2472 FRP vessel filter?

As a sand or multimedia filter at 10 m/h, about 3 m³/hr. At 8 m/h for dirtier water, about 2.3 m³/hr.

How much media goes in a 1465 vessel?

Its gross volume is about 164 litres. Fill to about 60 to 70 percent with media and support gravel, leaving freeboard for backwash.

## Not sure what to order?

Send your application and current filter. We reply on WhatsApp.

[Ask an engineer](https://wa.me/918160852169?text=Hello%20Filtsap%2C%20I%20read%20your%20guide%20%22FRP%20vessel%20size%20chart%3A%20sizes%2C%20volume%20and%20flow%20rate%22%20and%20need%20advice.)  [Request a quote](https://www.filtsap.com/get-quote/)

More guides

- [Filter micron rating guide](https://www.filtsap.com/guides/filter-micron-rating-guide/)
- [Spun vs wound vs pleated filter cartridge](https://www.filtsap.com/guides/spun-vs-wound-vs-pleated-filter-cartridge/)
- [How to choose a bag filter](https://www.filtsap.com/guides/how-to-choose-bag-filter/)
- [When to replace a filter cartridge](https://www.filtsap.com/guides/when-to-replace-filter-cartridge/)

## Need help choosing?

Send your application details and our team will recommend the right filter, at no cost.

[Get a quote](https://www.filtsap.com/get-quote/) [WhatsApp](https://wa.me/918160852169?text=Hello%20Filtsap%2C%20I%20need%20a%20quote.)