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Johnson & Starley TTB Spillage Device B502-0502000

Johnson & Starley

Johnson & Starley TTB Spillage Device B502-0502000

TTB spillage device for Johnson & Starley Hispec warm air units, detecting flue product spillage and shutting down the appliance.

At a glance

  • Part type: TTB spillage device
  • Also known as 1690975
Manufacturer part no.
B502-0502000
GC number
E02-419
Showing prices

£99.26

£82.72 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The TTB spillage device is a safety component manufactured by Johnson & Starley for use on Hispec warm air units. It monitors for the spillage of flue products and shuts the appliance down when spillage is detected, protecting the installation and its occupants. It is supplied as a serviceable spare for the Hispec range.

Signs this part needs replacing

  • The appliance repeatedly locks out with no other fault found
  • The unit fails to fire or shuts down shortly after ignition
  • Evidence of flue product spillage around the draught diverter or appliance casing
  • The device trips intermittently without a change in operating conditions
  • Visible corrosion, heat damage or mechanical damage to the device or its sensing element

Before you order

  • Confirm the appliance model and GC number from the data plate against the fitment list
  • Check the existing spillage device part number on the appliance before ordering
  • Investigate the cause of any spillage, such as a blocked flue or heat exchanger fault, before fitting a replacement
  • Confirm the appliance is a Johnson & Starley Hispec warm air unit

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.