Complete Pump Supplies | Supplier Domestic Water Pumps & Booster Pumps

Reflex 8 Litre Flow Through Potable Expansion Vessel

Reflex 8 Litre Flow Through Potable Expansion Vessel


reflex logo
Product code: PVA8G
£129.50 inc. VAT
Save £200.42
Valid until 30/12/2019
Ship to:


Reflex 8 Litre Flow Through Potable Expansion Vessel

The flow through series of potable water vessels for use in the home and are ideal for using with water heaters as a way of saving money. 

Water flows through the vessel, it has a stainless steel connection and thereby meets the ultra exacting hygiene requirements of DIN 1988. 

The T piece required is supplied with the unit and the Flowjet flow through valve is optionally available.

Altecnic offer a complete range of flow through expansion vessels for use with potable water. The expansion vessels are manufactured to meet the requirements of PED 97/23/EC Directive and BS EN 13831:2007 ‘Closed expansion vessels with built in bladder for installation in water’.

Manufactured in carbon steel with a two or three part weld construction. Pre-pressurised air chamber with synthetic rubber compound bladder. The internal surfaces of the vessel in contact with the water are coated against corrosion. External surfaces have a green durable powder coated finish. Suitable for temperatures up to 70˚C, resistant to ethylene or propylene glycol mixtures and has low gas permeability. Available with ‘flowjet’ 4 function valve. Rp¾ bronze ‘Tee’ supplied as standard for easy installation 33 litre vessel has integral wall mounting bracket. Altecnic expansion vessels are all tested according to the Pressure Systems Directive. How It Works In a closed hot water circuit, the water cannot be compressed so any increase in volume, created by an increase in temperature, has to be accommodated by an expansion vessel. When water is cold, the pre-charge pressure forces the bladder to collapse until the pump is started when the bladder starts to inflate. As the temperature in the system increases, with the associated increase in pressure and volume, the expanded water enters the bladder creating additional volume and lowering the pressure. When the temperature decreases, the pre-charge pressure forces the water from the bladder and back into the main water circuit.

Component Material
Shell Carbon steel
Connection Stainless steel
Bladder Synthetic rubber compound
Coating Powder epoxy
Technical Specification  
Max. working pressure: 10 bar
Max. operating temperature: 70˚C
Factory air pre-charge: 4.0 bar - nitrogen
Non Replaceable bladder  
System water connection thread: BE EN ISO 228 - male parallel


Product Code Capacity (litres) Dimmension (mm) Height (mm) Connection  Weight (kg)
PVA8G 8 206 335 G 3/4 2.7

Flowjet Valve

The Flowjet valve enable 4 functions to be performed easily.

  • Continuous water flow through the bladder helping to maintain the quality of the potable water by minimising stagnation.
  • Isolation should the expansion vessel need to be removed
  • Drain facility
  • Bypass




There are no reviews yet.

Add review

  • Overall satisfaction
  • Quality
  • Value for money
  • Performance
  • Ease of use
Spam protection:

Type or copy & paste the code you see on the left side.


Delivery Information

Free delivery relates to MOST products on the Website over the value of £100.00 (excluding VAT). 

*Unless otherwise stated on individual items* 

Products purchased under £100.00 will incur a £6.95 delivery charge.

Standard Delivery Orders over £100.00 (3-5 working days)* - Free shipping for in stock items to mainland UK*. 

Next day shipping is only available for stock items which are ordered before 14:00 at a charge of £12.50*. Any orders that are placed after this time will be processed the following day.

Specified delivery times are based on orders placed before 2pm Monday to Friday (excludes Weekends and Bank Holidays)  - for more details please see "UK Shipping Charges" below.

Weekend or orders placed on a Bank holiday will be dispatched on the next working day.

*Excludes UK Islands, Republic of Ireland and Scottish Highlands.

During Christmas and New Year our warehouse will be closed. Orders over this period will be dispatched on the first working day after New Year.

Delivery times are subject to change if the item is out of stock with our supplier. There are products on our Website that are not stocked at our warehouse, nor with our manufacturer's UK warehouses, therefore lead times can vary. This is why we recommend you contact us prior to purchasing to check current stock levels and lead times.

If you are not available to take a delivery on the specified date, you must let us know immediately. If we attempt to deliver your order and no-one is in, a re-delivery charge may be incurred.  

As we use 3rd party delivery agents, Complete Pump Supplies are unable to guarantee that all deliveries will be the next working day. Complete Pump Supplies will not be liable for any loss of income, loss of profits, loss of markets, loss of reputation, loss of customers, loss of use, loss of an opportunity even if we had knowledge that such damages or loss might arise or for any indirect, incidental, special or consequential damages or loss howsoever arising.

Web design by Brick technology Ltd.