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Over 20 years' experience in manufacturing, product development and distribution


Latest Press Releases

TeslaUK launches new Expansion Vessel Service Valve

10 September 2018

TeslaUK is launching the new Expansion Vessel Service Valve, which enables installers to service and/or replace an expansion vessel without having to drain down the whole system.

Aimed at saving engineers time and money, the valve is set for launch in July and will be available from every Screwfix branch from September. TeslaUK also supplies to other national merchants and distributors. RRP is £14.95.

Key benefits include:

• Isolate without having to drain down the whole system
• No need to add inhibitor back into the system
• Allows the vessel to be isolated and drained for essential periodic servicing and re-charging
• Shut off and drain, for membrane expansion vessels in sealed heating and cooling systems
• Protected shut/open facility against inadvertent closing
• Anti-tamper lever
• Drain vessel contents according to EN 12828
• Can be used in conjunction with the Tesla Sealed System Installation Kit (EVCKIT)
• Supplied with washer and locking wire
• Swivel nut for ease of installation
• Includes swivel drain off

“We’re really excited about the new Expansion Vessel Service Valve,” said Richard Hardcastle – Sales & Marketing Manager at Tesla UK.

“We showcased it at Installer2018 and it was very well received with installers – lot’s of them were asking where they could buy it from. With the time it can save engineers on a job, it’s going to be a very popular solution.”

Tesla launches Expansion Vessel Service Valve

10 September 2018

The Expansion Vessel Service Valve (EVSV) by Tesla UK Ltd allows the expansion vessel to be isolated and drained for essential periodic servicing, re-charging and even replacement.

The EVSV saves the installer time and money as there’s no need to drain down the whole system. It typically takes on average 60-90mins to drain down the system whereas if you were to fit the expansion vessel service valve by Tesla UK, you would be saving at least an hour of labour. There’s also the added benefit of not having to replace system chemicals.

The added features and benefits also include an anti-tamper lever, protected shut/open facility against inadvertent closing, swivel nut for ease of installation, swivel drain off. The EVSV can be connected directly onto a sealed system kit without the need for adaptors and comes complete with washer and locking wire.

The valve was showcased at Installer Show in May with many installers expressing a keen interest in the product, finding the RPP of £14.95 very reasonable, realising that this product will save them time and money and asking where they could buy it from.

Stock is now available from Tesla UK from and has already been taken on by Screwfix ready for a September catalogue launch. Talks are also in place with other national and independent merchants so we hope the valve will be readily available to installers within the next few weeks.