Instanta CTSV135T18 MOD18 135 Ltr Twin Tap Counter Water Boiler

The Instanta CTSV135T18, commonly referred to as the MOD18, is a 135-litre counter-mounted autofill water boiler fitted with twin dispensing taps. It draws continuously from the mains cold water supply, maintaining a large ready reservoir of hot water throughout service without requiring any manual refilling or monitoring from the operator. It is a straightforward, practical solution to sustained high-volume hot water demand.

At this capacity, the unit is built for environments where hot water demand is both heavy and prolonged — hotel banqueting suites, contract catering kitchens, large staff restaurants, and busy canteens. The twin-tap arrangement allows two members of staff to draw simultaneously, which makes a meaningful difference during peak periods such as morning coffee service or a large seated lunch where queuing at a single tap would quickly create a bottleneck. The three-phase hardwired connection this unit requires is what enables it to heat and recover at the rate needed to keep pace with that level of demand — a single-phase unit at this scale would not sustain the same throughput.

From a day-to-day operational standpoint, the key advantages are:

• Twin swivel-arm taps allow simultaneous dispensing and reduce spillage at the service point
• Autofill operation removes any need for manual refilling or constant monitoring
• Low-voltage switching provides an added layer of safety in wet service environments
• Onboard diagnostics help maintenance staff identify faults quickly and minimise downtime
• Counter-mounted format keeps the unit accessible without occupying floor space

Installation requires a three-phase hardwired electrical supply, which must be connected by a qualified electrician — this is not a plug-in unit and sites without three-phase power will need to consider an alternative. A mains cold water connection is required for the autofill function. At 135 litres when full, the unit is substantial in weight, so the counter or support structure beneath it should be assessed for load-bearing capacity before installation is finalised. Positioning should also allow reasonable access for routine descaling and servicing, which is particularly important in hard-water areas where scale build-up can affect performance and element longevity.

This model is well suited to operations running extended service periods with consistently high hot water demand. For smaller sites, or those without access to three-phase power, lower-capacity single-phase models are available in the range. Equally, for very high-footfall sites where even a 135-litre reservoir may be stretched during peak service, a higher-output unit may be worth considering.

If you would like to talk through whether this capacity and configuration is the right fit for your site — or if you have questions about the electrical or plumbing requirements — our team is happy to help you work through it before you order.