MasterFlash No4 Square-Base 70-178mm

The MasterFlash No4 is a square-base pipe flashing for pipes from 70 to 178mm where they come through the roof. It uses a black EPDM sleeve that is flexible, weather resistant and rated to 135C intermittently, which covers most standard plumbing, vent and flue pipes. The flexible base moulds to the roof profile, and the flashing is BAL compliant, so it is suitable for use in bushfire-prone areas.

Key Features

• Fits pipe penetrations from 70 to 178mm
• Black EPDM sleeve rated to 135C intermittently
• Cut-to-fit sleeve for a snug seal around the pipe
• Flexible base conforms to the roof profile
• BAL compliant for bushfire-prone areas
• Also available in grey EPDM and high-temperature red silicone

Specifications

• Product: MasterFlash No4
• Product code: MFS4B
• Pipe range: 70-178mm
• Sleeve material: EPDM rubber
• Temperature rating: 135C intermittent (red silicone version rated to 260C)
• Size range: 0mm to 1m available across the range
• Colours: black, grey, red silicone; BHP roofing colours on request

Installation

Slide the flashing over the pipe and trim the sleeve to the exact pipe diameter where needed. Press the base down over the roof profile so it conforms to the corrugations or tiles, then fix it in place with suitable fasteners. The EPDM sleeve seals against the pipe and the flexible base seals against the roof, forming a watertight joint without mastics.

Applications

• Plumbing and vent pipes through metal and tile roofs
• Flues and exhaust penetrations
• Bushfire-prone areas where a BAL-compliant flashing is wanted
• New roofs and retrofits on profiled sheeting

What You Need To Complete The Job

For a smaller pipe use the MasterFlash No3, and for a large pipe over 178mm the MasterFlash No.7. Browse the Metal Roof Flashing range for the full kit.

Frequently Asked Questions

What size range is available in MasterFlash?

The range covers pipes from 0mm up to 1m. The No4 fits pipes from 70 to 178mm, and the other numbers in the range step up and down from there so there is a flashing for most pipe sizes.

What does BAL compliant mean for this flashing?

It means the flashing meets the requirements for use in bushfire-prone areas under the BAL scheme. That makes it a valid choice for a roof penetration on a BAL-rated build.

Can I get it in a different colour?

Yes. The standard is black EPDM, with grey EPDM and high-temperature red silicone options. BHP roofing colours are available on request for a closer colour match.

How hot can the flashing get?

The black EPDM sleeve is rated to 135C intermittently. For a flue that runs hotter, choose the red silicone version, which is rated to 260C intermittently.

Can I order for delivery or pickup?

Yes. You can order online and choose Australia-wide delivery or pickup from our Truganina trade counter in Melbourne’s west. Delivery windows depend on your postcode, and we send a confirmation once your order is ready. For any questions call (03) 93941400 or email orders@singhroofingsupplies.com.au.