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Ideal Sheath 15/16 Inch x 147mm 171788

Ideal

Ideal Sheath 15/16 Inch x 147mm 171788

Ideal sheath, 15/16 inch diameter x 147mm long, reference GUA0005, part number 171788, for Ideal Commercial appliances.

At a glance

  • Part type: Sheath
  • Also known as 1780094
Manufacturer part no.
171788
Showing prices

£36.48

£30.40 ex. VAT · VAT at 20%

Available to order · 5-7 working days
Available to order · 5-7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Ideal sheath (reference GUA0005) is a tubular probe pocket used on Ideal Commercial appliances. It holds a temperature sensor or thermostat probe in position against the water or heat exchanger surface while shielding the probe from direct contact with the system contents. The sheath measures 15/16 inch in diameter and 147mm in length, and is supplied under Ideal part number 171788.

Signs this part needs replacing

  • Temperature readings that drift, spike or sit outside the expected range for the appliance
  • The boiler short-cycling or locking out on a temperature-related fault code
  • Visible corrosion, pitting or a perforated wall on the sheath body
  • Heavy scale or sludge build-up on the sheath, reducing heat transfer to the probe
  • Moisture tracking into the pocket, causing intermittent sensor readings

Before you order

  • Confirm the appliance model and, where shown on the data badge, the GC number against the compatibility list
  • Check the existing sheath against the 15/16 inch diameter and 147mm length quoted here before ordering
  • Note the manufacturer reference GUA0005 and the alternative number 1780094 when cross-referencing the old component

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.