Pressure Vessel 8x35 – FRP Tank for Sand, Carbon, Arsenic & Softener Media
The Pressure Vessel 8x35 (Model 835) 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 Mid-Range Option in Our 8-Inch Vessel Range
At 35 inches tall, this vessel sits between our 8x18 (standard capacity) and 8x44 (higher capacity) sizes — a practical middle ground for installations that need more media volume than the 8x18 offers, without the full height of the 8x44.
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.
This vessel does not include media, a distributor tube, control valve, or strainer — those are selected and purchased separately based on your specific application.
Using a Strainer With This Vessel
Since this vessel is sold empty, you'll need a vessel strainer as part of your setup whenever you fill it with loose media like sand, carbon, arsenic removal media, or gravel. The strainer connects to the center riser pipe and sits at the bottom of the vessel, holding the media securely in place while letting filtered water pass through into the pipe and out to the next stage.
Strainer size depends on your specific riser pipe and setup rather than the vessel size alone — contact us to confirm the right strainer for this installation.
Which Size Do You Need?
| Model | Diameter x Height | Price | Best For |
|---|---|---|---|
| Pressure Vessel 8x18 | 8" x 18" | ₨9,000 | Standard-capacity commercial installations |
| Pressure Vessel 8x35 (this page) | 8" x 35" | ₨10,999 | Mid-range capacity — more than 8x18, less than 8x44 |
| Pressure Vessel 8x44 | 8" x 44" | ₨12,000 | Higher-volume commercial/industrial, deeper media bed |
| Pressure Vessel 21x62 | 21" x 62" | ₨65,000 | Industrial-scale, large commercial installations |
| Pressure Vessel 24x72 | 24" x 72" | ₨79,999 | Our largest capacity — major industrial installations |
(Links pending — need the corrected, brand-free URLs for your other vessel pages once those are updated.)
Operating Specifications (Confirmed From Manufacturer Label)
| Specification | Detail |
|---|---|
| Model | 835 (8 inch diameter x 35 inch height, nominal) |
| 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 | Natural/Translucent |
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 who need more capacity than an 8x18 vessel but don't require the full height of an 8x44.
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: Do I need a strainer with this vessel?
Yes — since this is sold empty, you'll need a strainer along with a distributor/riser pipe to hold your chosen media in place and allow filtered water to exit correctly. Strainer size depends on your specific setup — contact us to confirm the right size for this installation.
Q3: What's the difference between this and your 8x18 or 8x44 vessels?
Height and capacity. This 8x35 sits between the two — more media volume than the 8x18, less than the 8x44. All three share the same 8-inch diameter and the same operating specifications.
Q4: What's the maximum operating pressure?
150 PSI (10 Bar), confirmed directly from the manufacturer's label.
Q5: What color is this vessel?
Natural/translucent.
Q6: What is this vessel made of?
FRP (Fiberglass Reinforced Plastic).
Q7: Is delivery available across Pakistan?
Yes, nationwide delivery is available, including Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, and Multan.