Instanta CTSV135T18 MOD18 135 Ltr Twin Tap Counter Water Boiler

Name: Instanta CTSV135T18 MOD18 135 Ltr Twin Tap Counter Water Boiler
Brand: Instanta
SKU: CTSV135T18
Price: 4887.6 GBP
Availability: InStock

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The Instanta CTSV135T18 — known in the range as the MOD18 — is a 135-litre counter-mounted autofill water boiler fitted with twin dispensing taps. It connects directly to the mains cold water supply and maintains a large reservoir of hot water continuously throughout service, without any manual refilling or operator monitoring. It is a practical, no-fuss answer to sustained high-volume hot water demand.

At this capacity, the unit is designed for environments where hot water is needed heavily and consistently over long periods — hotel banqueting suites, contract catering operations, large staff restaurants, and busy canteens. The twin-tap configuration allows two members of staff to draw simultaneously, which makes a real difference during peak periods such as morning beverage service or a large seated lunch. A single dispensing point at this volume would quickly create a bottleneck. The three-phase hardwired supply this unit requires is what allows it to heat and recover at the rate needed to keep pace with that level of demand — a single-phase unit of comparable size would not sustain the same throughput.

The day-to-day operational advantages include:

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

Installation requires a three-phase hardwired electrical supply, connected by a qualified electrician — this is not a plug-in unit. Sites without three-phase power will need to consider a lower-capacity alternative. A mains cold water feed is required for the autofill function. At full capacity the unit carries considerable weight, so the counter or support structure beneath it should be assessed for load-bearing suitability before installation. Allow adequate access for routine descaling and servicing; in hard-water areas this is particularly important, as scale build-up affects both performance and element longevity over time.

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

If you want to work through whether this capacity and configuration is the right match for your site — or if you have questions about the electrical or plumbing requirements — our team is happy to help before you commit to an order.

Frequently asked questions

Is three-phase power essential, or can this unit run on a standard single-phase supply?

Three-phase hardwired power is a firm requirement for this unit — it cannot be run from a standard single-phase socket. The three-phase supply is what allows the boiler to heat and recover at the rate needed to sustain 135 litres across a busy service. If your site does not have three-phase power, a lower-capacity single-phase model from the Instanta range is likely to be the more practical choice.

What type of sites is the MOD18 genuinely suited to, and where might it be oversized?

This unit is best matched to high-footfall operations running long or continuous service periods — hotel banqueting, contract catering, large staff canteens, and similar environments where hot water demand is both heavy and sustained. For smaller cafés, compact staff kitchens, or sites serving modest covers, the 135-litre capacity is likely more than required and a smaller model would be a better fit both operationally and financially.

How important is descaling maintenance, and how does it affect the unit's performance?

Regular descaling is important for any high-capacity water boiler, but particularly so in hard-water areas where scale accumulates quickly on heating elements. Left unmanaged, scale reduces heating efficiency, extends recovery times, and shortens element life. The onboard diagnostics can help maintenance staff identify performance changes early, but a routine descaling schedule — matched to your local water hardness — is the most effective way to protect the unit and maintain consistent output.

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