Apply for a Trade Account Here

Zip Electronic Inline Instantaneous Water Heater 2.8kW, 4kW & 6kW

£324.00 £270.00
In stock
Only %1 left
Delivery Time:
48 Hours Delivery
1 Year
Quick Code:
Order Line:
01977 663331
  • Not suitable for industrial kitchen sinks!
  • Size: W186mm: D87mm: H135mm 
  • Inlet/outlet water connection G 3/8"
  • Suitable for 1 basin

Zip Electronic Inline Instantaneous Water Heater 3kW, 4kW & 6kW

The Zip ES range of water heaters are ideal for a range of taps that have spray nozzles fitted. If not we supply with the water heater a universal spray nozzle that can be fitted to all standard 22-24mm threaded or un-threaded taps.

Zip InLine ES3 electronic instantaneous water heater single outlet for hand washing. Compact design, featuring bare-wire for fast heat up, no standing heat losses. Easy to install and service. The ES instant water heaters are also supplied with all accessories for a complete installation.

Slim-line design just 80mm (3.2) maximum projection from the wall. Designed with safety in mind and energy efficient. This range of instant water heater can be sited neatly under the sink or cupboard, ideal for limited space installations.

Suitable for 1 hand wash basin with flow rates of, 1.7 to 3.3 l/min increasing water inlet temperatures from 20C - 39C. "Therefore if the water inlet temperature is 15C, the ES3 will increase the temperature to 35C at 2ltrs min", please see download for more details on flow rates and temperature increases.

Pre-fitted with 650 mm length of cable. Operates comfortably with fluctuating incoming cold water pressures from: 1 bar up to 10 bar pressures. (14.6 - 147 PSI or lb/in2)


  • Supplied with all accessories
  • Three outputs to choose from, 2.8, 4.4 and 5.5kW
  • Highly efficient, bare wire (stainless steel) heating system IES
  • Double pole thermal cut-out protection
  • Operating pressure range, 1-10 bar, (14.6 - 147 PSI or lb/in2 )
  • Operates automatically, flow rates 1.7 to 3.3 l/min @3bar
  • Outlet temperature can be pre-set inside the unit between 30C - 50C
  • Flow & temperature sensors controls the power to stabilize outlet temperature
  • Factory temperature setting 38C
  • Not suitable for industrial kitchen sinks!
  • Size: W186mm: D87mm: H135mm 
  • Inlet/outlet water connection G 3/8"
  • Suitable for 1 basin
  • Waterproof rating: IP24
Product Code Power (kW) Dimensions (mm) Fuse (A) Flow l/min Usage
ES3 2.8 W186 x D87 x H135 13 1.5 / 2.0 1 x Hand Basin
ES4 4.4 W186 x D87 x H135 20 1.5 / 2.0 1 x Hand Basin
ES6 5.5 W186 x D87 x H135 25 1.5 / 3.3 1 x Hand Basin

Can i fit a 13A plug on the 2.8kW?

No, this water heater must be hardwired by a qualified installer

Am I able to install this water heater myself?

No: It is recommended that you have a qualified installer of electric instantaneous water heaters. You can either arrange this yourself or we can liaise with yourself and arrange for a qualified engineer to install onsite for you!

I live in a low water pressure area, is this going to be an issue?

The water heater ideally requires mains water pressure to ensure flow rates are maintained, however it still may be possible to run this unit from other low pressure supplies, please enquire.

The water supply we have available is from a header tank above is this suitable?

Yes this may be possible, as long at the minimum water pressure required by this particular water heater is met, please see product specifications for minimum water pressures.

How many outlets will this water heater supply?

It is advised that you only supply one outlet maximum. The water heater will work with multiple outlets but not simultaneously, the water flow rates and desired temperature would not be achieved!

What is the warranty of the water heater?

One years onsite manufacturer warranty!


I have a 13amp power supply will this water heater be suitable?

The 2.8kW will work from a 13A power supply, the 4.4kW requires a minimum of 20amp and the 5.5kW requires a minimum of 25amp, the 4.8 and 6.0kW must have an independent power supply!


Do I need any other accessories for this instant water heater?

No expansion kits needed, this water heater is supplied to enable a quick and easy installation!


Will this water heater supply a domestic sink?

The ES range has been designed for hand washing however the 6kW would be suitable for light use in a domestic sink for washing pots!


What temperatures can be achieved with this water heater?

This will depend on the water inlet temperature however this water heater is factory set to deliver >38C with flow rates of 1.7 to 3.3 l/min!


Will this water heater supply a shower?

No this water will supply a maximum of 3ltrs a minute not enough flow for a suitable shower supply!


I have an open tap can I use this water heater?

We supply the universal spray nozzle that can be fitted to all standard 22-24mm threaded or unthreaded taps, this water heater must be used with spray taps to work efficiently!


Can you fit a UK 13amp plug to this instant water heater?

No all instant water heaters must be installed by a competent electrician and for safety reasons they must be hard wired to a suitable power supply!


What size cable do I need for this ES instant water heater?

The 2.8kW requires a minimum of 1.5mm2, the 4.4kW requires a minimum 2.5mm2 and the 5.5kW requires a minimum of 4mm2!


I have very high water pressure will this affect the performance?

The ES range of instant water heater have inbuilt water stabiliser so they will regulate fluctuating water pressures ranging from 1 bar up to 10bar if you are unsure of your cold water supply pressure you can ask your water supplier to check this for you free of charge!


I don’t have a mains water supply can I use this instant water heater?

This water heater requires a minimum of 1 bar pressure. However if there are no mains water supplies you can use a header tank feed, this can be achieved with a cistern type water header tank giving a minimum head of 10 meters (33ft)!


I have a problem with lime scale will this water heater be suitable?

Yes the ES range of water heaters are suitable for hard water areas!


Do you have spare parts for this water heater?

We carry some spares for the ES range please call our sales team for any enquiries!


What pipe fittings do I need for this water heater?

All accessories are supplied however the pipe fittings are standard UK 15mm!


Can I install this water heater in an outbuilding that is not heated?

We do not recommend that this range of water heaters is installed in a room where it may be subject to freezing!


If I have a problem with this water heater who do I contact?

Zip has a customer help line number. Zip will also want to know when and where you purchased the goods from, if you have forgotten your date of purchase please call our customer services team and we will help you with all the information you require.

Our Delivery Charges and times are explained:


Delivery Charges
All deliveries have a standard charge of £7.99 + VAT up to 20kg. Where stated, certain products are delivered FREE of charge (mainland UK only*). Check the description of the desired product and if it says free delivery then you will not be charged for delivery*

Extra Charges
Where the weight is over 20kg we reserve the right to charge more dependent on product type and delivery postcode, our customer service team will be in touch and inform you of any extra charges before we despatch.

Delivery Times
All products will have a delivery time stated in their description. Next Working Day - these products will be delivered Next Working Day if ordered before 12.00, or in certain circumstances up until 4:00 pm. Please call if you require a Next Working Day and we will try our best to get it to you. Certain products will state within 48hrs, within 3 Days or within 5 days. These products will be delivered within the time stated. If you require delivery on a certain day please put this in the comments and we will aim to deliver on that day.

Certain products such as radiators are delivered after 5 working days, when purchasing a radiator please put in the desired delivery date which is 5 working days after ordering. In some cases, stock permitting, we can get radiators out sooner. Please call or put in the customer comments if you need something urgently and we will try our best.

Saturday Deliveries
We can arrange for a Saturday delivery for certain products, please call 01977 663331 for more details.

Please note: Although we will do our utmost to deliver your product in the time stated we cannot be held responsible for any unforeseen delays. Please do not book a plumber, electrician, etc until you have received the goods as we will not be held responsible for their time. Please read our terms and conditions for further details.

additional charges may be applicable dependent on your location please double-check with our customer service team

Our Returns Policy - Please click here!