Pressure Vessel 8x44 (Model 844) – FRP Tank for Sand, Carbon, Arsenic & Softener Media, Made in China
The Pressure Vessel 8x44 (Model 844) is an empty FRP (Fiberglass Reinforced Plastic) tank used as the housing for media-based filtration and water treatment in commercial RO plants. It's sold as the vessel only — you fill it with whatever media your application requires, whether that's sand for sediment filtration, activated carbon for dechlorination, arsenic removal media, water softener resin, or gravel as an underbedding layer.
A Taller Vessel for Higher-Capacity Applications
At 44 inches tall — significantly taller than our 8x18 vessel — this size holds a deeper media bed, suited to higher-volume commercial and industrial installations where greater treatment capacity or longer water contact time is needed.
Multi-Purpose by Design
Because this is an empty vessel, one tank design supports several different treatment functions depending on what you load it with:
- Sand: For sediment and turbidity removal in larger-scale pre-filtration.
- Carbon (GAC or similar): For chlorine, taste, and odor removal ahead of an RO membrane.
- Arsenic removal media: For treating groundwater with elevated arsenic levels — a documented concern in parts of Pakistan's groundwater supply.
- Water softener resin: For hardness removal via ion exchange.
- Gravel: Commonly used as a support/underbedding layer beneath the primary media, protecting the bottom distributor from media loss.
This vessel does not include media, a distributor tube, or a control valve — those are selected and purchased separately based on your specific application.
Which Size Do You Need?
| Model | Height | Price | Best For |
|---|---|---|---|
| Pressure Vessel 8x18 | 18 inch | ₨9,000 | Standard-capacity commercial installations |
| Pressure Vessel 8x44 (this page) | 44 inch | ₨12,000 | Higher-volume commercial/industrial applications needing deeper media beds |
(Note: update the 8x18 link above once its URL is updated to remove branding, per your instruction.)
Operating Specifications (From Manufacturer Label)
| Specification | Detail |
|---|---|
| Model | 844 (8 inch diameter x 44 inch height, nominal) |
| Origin | Made in China |
| Construction | FRP (Fiberglass Reinforced Plastic) — standard construction for this vessel type |
| Max Pressure | 150 PSI (10 Bar) |
| Operating Temperature | 34–120°F (1–49°C) |
| Max Vacuum | 5" Hg (127mmHg) |
| Approved Use | Water treatment applications only |
| Not Approved For | Pneumatic or hydro-pneumatic applications |
| Minimum Exposure Temperature | Must not be exposed below -17°F (-27°C) |
| Color | Blue |
Important: Do not exceed the specifications listed above — this is stated directly on the manufacturer's label as a safety requirement, not just a recommendation.
Who This Is For
Commercial RO plant builders, water treatment technicians, and dealers assembling custom filtration systems for sand filtration, carbon filtration, arsenic remediation, or water softening applications that need greater media capacity than a standard-height vessel provides.
Frequently Asked Questions
Q1: Does this vessel come with filter media included?
No — this is the empty vessel only. You select and fill it with the media appropriate for your application (sand, carbon, arsenic removal media, softener resin, or gravel), purchased separately.
Q2: What's the difference between this and the 8x18 vessel?
Height and capacity. This one is 44 inches tall (vs. 18 inches), holding a deeper media bed for higher-volume commercial and industrial applications. Operating specifications (pressure, temperature) are the same across both sizes.
Q3: What is this vessel made of?
FRP (Fiberglass Reinforced Plastic) — the standard construction for this type of pressure vessel in water treatment applications.
Q4: What's the maximum operating pressure?
150 PSI (10 Bar), per the manufacturer's specification label.
Q5: What temperature range is this rated for?
34–120°F (1–49°C) for operation. It must not be exposed to temperatures below -17°F (-27°C), even when not in use.
Q6: Can this be used for pneumatic or air pressure applications?
No — this vessel is approved for water treatment use only, and must not be used for pneumatic or hydro-pneumatic applications.
Q7: What does "8x44" mean?
It refers to the vessel's nominal size — 8 inches in diameter by 44 inches in height.
Q8: Is delivery available across Pakistan?
Yes, nationwide delivery is available, including Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, and Multan.