1. Introduction

• Importance of pressure vessels in booster pump systems
• How Wates pressure vessels help stabilize pressure, reduce pump cycling, and extend pump lifespan
• Correct installation is critical for performance, warranty validity, and long-term reliability

2. Tools and Materials Required

• Adjustable wrench / pipe wrench set
• PTFE or thread sealing tape
• Ball valve (isolation valve)
• Pressure gauge (0–10 bar or as required)
• Tee fitting or manifold connection for discharge line
• Union fittings for easy removal
• Air pump or small compressor (for pre-charge adjustment)
• Pipe support clamps or brackets
• Optional: anti-vibration rubber base pads

3. Pre-Installation Checks

1. Verify vessel size based on drawdown requirement and pump duty
2. Confirm vessel orientation type (vertical or horizontal)
3. Check for factory pre-charge pressure (marked on label)
4. Inspect tank body, coating, and fittings for damage
5. Ensure installation location meets conditions:
   • No direct sunlight or outdoor exposure unless sheltered
   • Accessible for future maintenance and pressure adjustment
   • Not installed on unstable or vibrating surfaces

4. Step-by-Step Installation Procedure
Step 1: Position the Vessel

• Place vertical vessel on level surface with adequate clearance
• Horizontal tank must be installed on saddle bracket or mounting frame
• Leave access to air valve and bottom connection

Step 2: Install an Isolation Valve

• Fit a ball valve between vessel and pump discharge line
• Allows vessel removal without draining the full booster system
• Mandatory for maintenance-friendly installations

Step 3: Connect Vessel to the Pump Discharge Line

• Use a tee fitting or manifold port after the pump outlet
• Ensure vessel inlet is mounted on pressure side, never on suction side
• Use PTFE tape and torque evenly to prevent thread leaks

Step 4: Install a Pressure Gauge and Drain Point

• Gauge allows pressure monitoring and troubleshooting
• Drain point helps in vessel replacement and servicing
• Recommended: gauge + isolation valve + drain assembly on same branch

Step 5: Set and Verify Pre-Charge Pressure

• Measure air pressure using a tire-type gauge at the Schrader valve
• Adjust air charge before filling with water
• Pre-charge must be 0.2 – 0.5 bar below pump cut-in pressure
  Example: Pump starts at 2.5 bar → Vessel pre-charge 2.0–2.3 bar

Step 6: Commission System

• Turn on pump and allow it to reach cut-out pressure
• Check for leaks at vessel connection and manifold joints
• Confirm that water enters vessel and pressure stabilizes
• Open tap to test drawdown and pump restart sequence

5. Suggested Booster Pump Piping Layout (Text Description)
Pump → Check Valve → Discharge Manifold → Tee → Isolation Valve → Vessel
Additional ports: pressure gauge, pressure switch, PRV, drain valve
(Can be turned into a diagram if needed)

6. Post-Installation Checklist

• Vessel firmly mounted and accessible
• Pre-charge pressure written on tank or log sheet
• Isolation valve and drain valve installed
• Pressure gauge installed and readable
• No visible leaks on pump discharge line
• Pump cycling frequency within acceptable range (10–20 starts/hr)

7. Common Installation Mistakes to Avoid

• Connecting vessel on pump suction side
• Skipping pre-charge adjustment
• Installing vessel without isolation valve
• Mounting vessel in a closed room with no ventilation
• Over-tightening threaded fittings and damaging vessel connection
• Leaving tank unsupported or touching nearby vibrating equipment

8. Maintenance After Installation

• Check vessel pre-charge every 6–12 months
• Replace bladder if tank becomes waterlogged
• Inspect exterior coating for corrosion (especially in high-humidity UAE pump rooms)
• Monitor pump start frequency – rapid cycling indicates wrong sizing or loss of air charge

9. UAE/GCC Installation Notes

• Always install in shaded or indoor pump rooms due to high ambient temperatures
• Use stainless-steel fittings in coastal areas (Dubai Marina, Yas Island, Ajman Corniche)
• PED/CE/WRAS certification required for potable water booster systems
• Consider additional insulation if room temperature exceeds 45°C

A properly installed Wates pressure vessel improves pump performance, increases equipment life, and ensures stable pressure delivery. Correct connection, pre-charge adjustment, and periodic maintenance are the keys to long-term trouble-free operation. For more info contact Wates Pressure Vessel Supplier in UAE or call us at +971 4 2522966.

1. Introduction

• Why pressure vessel orientation matters during installation
• Wates manufactures both vertical and horizontal pressure vessels for different system layouts
• Correct selection improves stability, maintenance access, and hydraulic performance

2. What Both Vessel Types Have in Common

• Same internal working principle: bladder/diaphragm with pre-charged air cushion
• Same purpose: reduce pump cycling, stabilize pressure, provide drawdown volume
• Same installation requirements: pre-charge setting, isolation valve, pressure gauge, protected location
• Same standards: PED, CE, WRAS (potable water approved), EN 13831

3. Vertical Pressure Vessels
3.1 Where They Are Typically Used

• Domestic booster pump systems in villas and buildings
• Commercial pump rooms with floor space availability
• High-rise building pressure systems
• Well pump or borewell applications (floor standing)

3.2 Key Advantages

• Smaller footprint, needs minimal floor area
• Easier access to air valve and bladder inspection
• Better natural air/water separation due to gravity
• Available in a wide size range: 24 L to 5000+ L

3.3 Installer Considerations

• Must be placed on a level, flat base
• Requires vertical clearance for bladder replacement
• Must not be installed lying sideways (invalidates warranty)

4. Horizontal Pressure Vessels
4.1 Where They Are Typically Used

• Pump and tank assemblies where the pump is mounted on top of the vessel
• Compact installations inside under-sink or cabinet areas
• Automotive, RO units, and mobile water systems
• Small domestic booster kits (24–100 L range)

4.2 Key Advantages

• Saves space by allowing pump mounting directly on tank saddle
• Useful where floor height is restricted (e.g., under staircase, inside enclosure)
• Easy integration into packaged booster systems

4.3 Installer Considerations

• Must always be supported using manufacturer saddle or brackets
• Cannot be installed vertically unless designed for dual orientation
• Requires more horizontal space compared to vertical type

5. Which Type to Use? Installer Selection Guide
Situation
Recommended Vessel Type

Pump room with enough floor space
Vertical

Packaged booster pump assembly
Horizontal

Wall mounting required
Vertical (small size)

Under-sink or compact cabinet
Horizontal

System with frequent maintenance access needs
Vertical

Multi-pump header system
Vertical (single or multiple vessels)

6. Performance & Sizing Notes

• Orientation does not change tank capacity, drawdown, or pressure rating
• Drawdown depends on cut-in/cut-out pressure, not tank position
• Horizontal tanks may require periodic repositioning for air pocket issues (rare but possible)
• Vertical tanks are preferred for larger systems due to ease of servicing

7. Common Installer Mistakes to Avoid

• Laying a vertical vessel on its side
• Mounting a pump on top of a vertical vessel (not designed for load)
• Installing horizontal vessel without saddle support — causes weld stress cracks
• Forgetting to leave clearance for air valve access
• Selecting horizontal tank only because it “looks compact,” ignoring serviceability

8. UAE/GCC Installation Considerations

• Vertical tanks preferred in villa pump rooms due to heat rise and better ventilation
• Horizontal tanks often used in pre-packaged booster sets brought from Europe
• Always install in shaded area: vessels degrade faster in direct sun exposure
• Stainless or epoxy-lined versions recommended in coastal cities (Dubai, Ajman, Ras Al Khaimah)

Both vertical and horizontal Wates pressure vessels provide the same hydraulic function, but installation layout, accessibility, and pump mounting requirements determine the correct choice.
Always choose based on available space, maintenance access, and pump system type — not just tank capacity. For more info contact Wates Pressure Vessel Supplier in UAE or call us at +971 4 2522966.

1. Introduction

• Why sizing a pressure vessel is critical before installation
• Undersized vessels cause rapid pump cycling, higher energy use, and early pump failure
• Oversized vessels increase cost and floor space without added benefit
• Wates vessels are available in multiple capacities (from 24 L to 5000+ L), so correct selection is essential

2. Role of a Pressure Vessel in a Domestic Water System

• Stores pressurized water to supply fixtures when pump is off
• Maintains stable pressure in the pipeline
• Reduces the number of pump starts per hour (standard design: 10–20 starts/hour max)
• Acts as a buffer tank to prevent water hammer and system shock

3. Key Factors to Consider Before Sizing a Wates Pressure Vessel
3.1 Pump Type

• Fixed-speed pump vs. VFD-controlled pump
• Fixed-speed pumps require larger vessel volume to control cycling
• VFD pumps may use smaller vessels but still need buffer volume for standby pressure retention

3.2 System Flow Demand

• Domestic villas: 30–60 LPM typical
• Small buildings: 80–150 LPM
• Larger systems or multi-pump sets: 200+ LPM

3.3 Required Number of Pump Starts per Hour

• Industry standard: 10–20 starts per hour to prevent motor damage
• More drawdown volume = fewer pump starts

3.4 Cut-In and Cut-Out Pressure

• Pressure settings determine usable drawdown volume
• Example: Cut-in 2.5 bar / Cut-out 4.0 bar

3.5 Available Space for Installation

• Vertical vessels require floor space
• Horizontal vessels can be mounted on top of the pump or frame

4. Basic Sizing Formula for Wates Pressure Vessels
The usable drawdown volume (water available per cycle) is calculated as:
Vd = Vt × (Pmax − Pmin) / (Pmax + 1)
Where:

• Vd = Drawdown volume (liters)
• Vt = Total vessel capacity (liters)
• Pmax = Maximum pressure (pump cut-out), in bar absolute
• Pmin = Minimum pressure (pump cut-in), in bar absolute

To find Vt:
Vt = Required Drawdown × (Pmax + 1) / (Pmax − Pmin)


5. Example Sizing Case (Domestic Villa Booster System)
System data:

• Pump cut-out pressure: 4.0 bar
• Pump cut-in pressure: 2.5 bar
• Desired pump starts per hour: 10
• Flow rate: 40 LPM
• Minimum water volume required: 40 L (4 minutes of standby between cycles)

Calculation:
Required Drawdown = 40 L
Total Vessel Size:
Vt = 40 × (4 + 1) / (4 − 2.5)
Vt = 40 × 5 / 1.5
Vt = 133 liters
Recommended Wates model: 150 L vertical vessel


6. Typical Wates Vessel Sizing Guide (Quick Reference)
Application
Flow Rate
Suggested Vessel Size

Small villa, 1–2 bathrooms
25–35 LPM
60 L to 80 L

Medium villa, 3–4 bathrooms
40–60 LPM
100 L to 150 L

Large villa or duplex
70–90 LPM
200 L

Small apartment building
100–150 LPM
300 L to 500 L

Multi-pump booster set
200+ LPM
500 L to 1000+ L


7. Common Sizing Mistakes Installers Make

• Selecting based on tank volume instead of usable drawdown
• Ignoring pump cut-in/cut-out settings
• Choosing 24 L or 50 L tanks for high-flow systems
• Not considering increased pump cycling from small tanks
• Assuming VFD pumps do not require pressure vessels

8. When to Use Multiple Pressure Vessels

• When system demand exceeds 500 L vessel capacity
• When installation footprint requires two smaller tanks instead of one large tank
• When redundancy is needed (e.g., hospitals, high-rise buildings)
• When connecting parallel booster pumps to a common header

9. UAE/GCC Installation Considerations

• High ambient temperatures require shaded tank location
• High-water hardness means bladder replacement frequency should be expected
• Stainless steel or lined tanks preferred for coastal areas (Dubai, Sharjah, Abu Dhabi)
• WRAS, PED, and CE certification required for potable water systems

Choosing the correct size Wates pressure vessel ensures:

• Longer pump lifespan
• Reduced energy consumption
• Stable and reliable water pressure
• Fewer maintenance issues and customer complaints

Sizing should always be based on drawdown volume, not total tank capacity. For more info contact Wates Pressure Vessel Supplier in UAE or call us at +971 4 2522966.

1. Pressure Vessels

• Why pressure vessels are required in domestic booster pump systems
• Role of a Wates pressure vessel in stabilizing pressure, reducing pump cycling, and protecting the system
• Brief note: This guide focuses on typical installations in villas, residential buildings, and small commercial setups

2. Tools and Materials Required

• Adjustable wrench set
• PTFE/Teflon tape
• Pressure gauge (0–10 bar or based on system rating)
• Isolation valve (ball valve)
• Pump manifold or tee fitting
• Pipe fittings and unions (GI, brass, or SS depending on system)
• Mounting brackets or floor stand (if required)
• Air pressure pump or compressor for pre-charge adjustment
• Thread sealant or pipe dope

3. Pre-Installation Checks

1. Verify the vessel size and pressure rating match the pump system design
2. Confirm model type: vertical or horizontal mounting
3. Check vessel for physical damage, dent, or coating defects
4. Confirm factory pre-charge pressure written on label
5. Ensure location meets installation conditions:
   • Protected from direct sunlight and weather
   • Adequate floor space or wall support
   • Accessible for maintenance and pressure checks

4. Step-by-Step Installation Procedure
Step 1: Position the Vessel

• Place the vessel in a vertical or horizontal position based on model
• Ensure vessel is level and properly supported
• Leave minimum 200–300 mm clearance for servicing the air valve and fittings

Step 2: Install an Isolation Valve

• Fit a ball valve between vessel and pipeline to allow future maintenance
• This allows vessel removal without draining entire system

Step 3: Connect the Vessel to the Pump Discharge Line

• Use a tee connection right after the pump outlet or on the manifold
• Ensure water inlet is connected to bottom port (for bladder tanks)
• Use proper sealing tape to prevent thread leaks

Step 4: Fit a Pressure Gauge

• Install a gauge near the vessel or on the discharge manifold
• This allows monitoring of system pressure and vessel performance

Step 5: Check and Adjust Air Pre-Charge Pressure

• Before filling with water, measure vessel pre-charge using air valve (Schrader)
• Adjust using a hand pump or compressor
• Pre-charge should be 0.2–0.5 bar lower than pump cut-in pressure
  Example: If pump starts at 2.5 bar, set vessel at 2.0–2.3 bar

Step 6: Start the Pump and Fill the Vessel

• Open isolation valve, turn on pump power
• Allow pump to run until system reaches cut-off pressure
• Check for leaks at all fittings and joints

Step 7: Test Cycle and Drawdown

• Open a faucet to release pressure and watch if pump restarts as per settings
• Confirm that water flows from the vessel before pump activation (stored drawdown volume)

5. Post-Installation Checklist

• Air pressure label updated after commissioning
• Isolation valve operable and accessible
• Vessel installed in a protected and ventilated location
• No pipe stress or strain on vessel connection
• No air or water leaks after pressure test
• Pressure switch settings confirmed (cut-in and cut-off)

6. Common Installation Mistakes to Avoid

• Not checking or adjusting pre-charge pressure
• Installing vessel in direct sunlight or high-heat area
• Overtightening fittings and damaging tank threads
• Mounting vessel without isolation valve
• Connecting vessel to suction side of the pump instead of discharge side
• Leaving vessel unsupported, causing stress fractures at connection point

7. Ongoing Maintenance After Installation

• Check pre-charge pressure every 6–12 months
• Inspect tank exterior for rust, coating damage, or condensation
• Monitor pump cycling frequency – fast on/off cycles indicate vessel problems
• Replace bladder if vessel becomes waterlogged

8. Applications for This Installation Method

• Villa booster pump systems
• Domestic well pump systems
• Residential RO or water filtration systems
• Small commercial buildings and cafés
• Irrigation and garden water supply

A correctly installed Wates pressure vessel ensures stable water pressure, longer pump life, and reduced energy consumption. Proper sizing, correct pre-charge, and correct plumbing layout are key to long-term performance. ​For more info contact Wates Pressure Vessel Supplier in UAE or call us at +971 4 2522966.

A Wates pressure vessel works on the principle of separating water and compressed air inside a sealed steel tank. Instead of storing water in an open tank, the vessel uses an internal bladder or diaphragm to maintain a controlled air cushion that creates and stabilizes pressure in the system.

How It Works – Step by Step

1. Empty Vessel State
   • The tank is pre-charged at the factory with compressed air (for example, 2.0 bar).
   • Inside the vessel, the air occupies the entire volume because no water has entered yet.

1. Pump Starts and Water Enters the Vessel

1. • When the water pump starts, water flows into the vessel through the bottom connection.
   • The water fills the bladder or diaphragm chamber, pushing against the trapped air.

1. Air Compression Creates System Pressure

1. • As more water enters, the air in the top section of the vessel gets compressed.
   • Compressed air acts like a spring, storing energy and increasing the internal pressure.
   • This stored pressure is what keeps the pipeline pressurized even when the pump stops.

1. Pump Stops – Stored Pressure Takes Over

1. • When the system reaches the cut-off pressure (example: 4 bar), the pump switches off.
   • The compressed air pushes the water out of the vessel, supplying the taps, fixtures, or network without the pump running.
   • This prevents rapid on/off cycling of the pump.

1. Pressure Drops – Pump Starts Again

1. • As water is discharged from the tank, the air expands and pressure gradually falls.
   • When it reaches the pump cut-in pressure (example: 2.5 bar), the pump starts again and refills the vessel.

Why the Internal Air Cushion Is Important
Function
Benefit

Acts as a pressure buffer
Reduces pump cycling and motor wear

Maintains constant water pressure
Prevents pressure drop at fixtures

Stores usable water volume (drawdown)
Reduces energy use and pump run time

Absorbs shock and vibration
Prevents water hammer in pipework

Improves system efficiency
Extends pump and valve lifespan

Key Notes for Installers

• The air pre-charge must be set correctly before commissioning (always 0.2–0.5 bar below pump start pressure).
• If air leaks or is not maintained, the tank becomes waterlogged and loses function.
• Wates vessels use a butyl or EPDM bladder, which prevents water-air mixing and reduces corrosion risk.  For more info contact Wates Pressure Vessel Supplier in UAE or call us at +971 4 2522966.