Trevi E960739AA Boost to Therm Conversion Kit (Ideal Standard)

SUMMARY

E960739AA Ideal Standard / Trevi Boost to Therm Conversion Kit
Brand: Ideal Standard / Trevi
Spare Part: Boost to Therm Conversion Kit
Installation: Screw In Cartridge

The Trevi (Ideal Standard) Boost to Therm Conversion Kit is compatible with:
- E9005AA Trevi Boost Exposed Mains Pressure Shower Valve
- E9105AA Trevi Boost Concealed Mains Pressure Shower Valve

Included is everything you see in the second image which has a green tag:
- A963515AA
- A963506AA
- S960134NU
- A953957NU11 (embossed in plastic A923360 A POM 2)
- A963649NU
- A923348 (number 10 in breakout diagram)
- A91842814

The Trevi Boost to Therm Conversion Kit (E960739AA) is a genuine replacement part by Ideal Standard / Trevi. It is eligible for next day delivery, provided it is ordered before 3:00 PM from Monday to Friday.

Changing your shower system from a hot and cold gravity system to a combination boiler will entail the need for a conversion kit. The Trevi Boost shower valve maintains a gravity fed water system. Switching to a combination boiler will render the Boost cartridge ineffective, thus, the Trevi Boost to Therm Conversion Kit E960739AA is necessary in order to provide the right balance between water supplies from a new boiler system.

Water Systems: Gravity Fed and Combination Boiler
A water system will influence the strength of the water output from a bath tap or a showerhead. Gravity-fed water systems and combination boiler are two water distributing structures; the former uses low pressure while the latter is an instantaneous water system.

Because of the difference in structure and pressure, changing from a gravity-fed to a combination boiler will require conversion. The Trevi Boost to Therm Kit (E960739AA) is made specifically to help the Trevi Boost cartridge cope with the new system.

Please check out our Water Systems Guide.

Gravity-Fed Water Systems
Water from a hot water cylinder and a cold water tank are fed through the pipes leading to various water outlets inside a home. The cold water feed is installed in the upper part of the house whereas the hot water tank is situated below.

In a hot and cold gravity-fed water system gravity acts as a natural pump moving water down from the cold storage tank to the hot water cylinder where it is made and kept hot.

In a gravity hot feed cold mains fed system, hot water has a lower water pressure than cold water. The uneven pressure between the two supplies is reconciled with the use of a pressure equalizing valve which ensures the water pressure from the mains and the hot water feed are correspondingly as stable as possible.

Combination Boiler
By contrast, a combination water system has one water storage tank called a boiler, hence the name combination boiler. It heats water coming directly from the mains and supplies a shower or tap with hot water instantly. Grit, dirt, and other debris will adhere less to the boiler. The system is also known for being highly-efficient and cost-effective due to less piping.

With a combi boiler, operating more than one tap will result in lower water pressure.

In the UK alone, more than 70 percent of homes are fitted with a combination boiler.

We carry a catalogue of Ideal Standard Trevi spare parts.

Need this spare part fast?
The Trevi Boost to Therm E960739AA Conversion kit is available for next day delivery when purchase is made:
- on a weekday
- before 3:00 PM.

Confirmed Compatible Models

The following applications are restricted to the older ribbed-control Boost version. Check the existing valve and controls rather than relying on the model code or installation date alone.

- - Trevi Boost E9005AA built-in mains-pressure shower valve with Elipse BIV shower kit

- - Trevi Boost E9105AA exposed mains-pressure shower valve with Elipse EV single-function shower kit

Before Ordering and Fitting

Check that the shower is the older ribbed-control Boost version, not the later smooth-control version. Have the proposed water supplies and existing valve condition assessed before ordering. Sharing individual handles or cartridges with another Trevi model does not establish that this complete conversion kit is suitable for that model.

Isolate both water supplies before dismantling the valve. The conversion should be carried out by a suitably qualified installer, with the temperature setting, operation and watertightness checked before the shower is returned to use.

Troubleshooting

Symptom: water continues to drip from the shower head when the shower is turned off. Likely Cause: worn flow-control cartridges or damaged or slipping control gears. Solution: inspect the separate flow cartridges and gear assembly. Replacing the thermostatic cartridge alone does not repair these components, and a dripping shower does not automatically require a Boost to Therm conversion.

Related Spares You May Need

Individual Kit Components

The following parts are already included in E960739AA. Their individual listings are useful for separate servicing and should not be treated as additional purchases required with the complete kit.

- - Trevi A963515AA chrome on/off and volume-control handle

- - Trevi A963506AA chrome temperature-control handle

- - Trevi S960134NU thermostatic cartridge

- - Trevi A953957NU11 temperature adjustment carrier

- - Trevi A923348 volume-control handle carrier

- - Trevi A91842814 M4 x 23.5 mm volume-control handle screw

Additional Valve Servicing Parts

These parts are for separate repairs to the associated valve mechanism or trim. Match them to the installed assembly before ordering. The two flow-cartridge listings below cover the same service requirement; do not order both as different cartridge types. Similarly, check whether the complete gear assembly or individual gears and spindle are needed.

- - Trevi A952501NU flow-control cartridge: replacement code for A952501NU11

- - Trevi A952501NU11 flow-control cartridge listing: earlier-code listing supplied as the newer brass version

- - Trevi A963067NU gear and spindle assembly: includes two gears and the spindle with its gear

- - Trevi A960489NU pair of gear slip clutches

- - Trevi A953155NU11 gear spindle

- - Ideal Standard A918434AA M4 x 50 chrome cover-fixing screw: aftermarket spare rather than the discontinued original screw

- - Trevi A907294LJ T-logo handle cap

- - Trevi A962585NU black handle cap

- - Trevi A918416 temperature-control handle screw: also identified as A918416NU11 and distinct from the supplied A91842814 volume-control screw

- - TACSIL TAC86 3g cartridge silicone grease: optional servicing consumable

Original Boost Repair and Discontinued Reference Parts

- - Trevi A963348AA original Boost cartridge: for repairing the original Boost arrangement, not the S960134NU thermostat supplied in this conversion kit

- - Trevi A953154AA11 built-in shower valve faceplate: discontinued reference for the built-in arrangement and not included in the conversion kit

- - Trevi A923142 black gearbox cover: discontinued reference for the associated flow-control mechanism

Use the Di Vapor part identification service for help choosing the right kit.

FAST DELIVERY

• Delivery of this item is priced as a 'small packet'. UK delivery costs £5.95 incl. VAT.
• For all in-stock spare parts the typical UK delivery timescale is 2-5 working days.
• If you need a part urgently then we can provide a next-day (delivered Mon-Fri) UK delivery service for all in-stock small parcels ordered before 3.00pm, Monday - Friday.
• Next day delivery is available to select at an additional charge during the checkout.
• We delivery WORLDWIDE. For more information about international deliveries, read our delivery page.

RETURNS

• If you need to return a part then please telephone Di Vapor on 0121 705 0866 with the reasons for the return within 14 days of receiving the goods.
• For more information please see our terms and conditions.