Polystyrene Plumber Blocks

Keep pipes level, protected and supported.
Our Polystyrene Plumber Blocks are commercial-grade EPS (expanded polystyrene) supports for plumbing, gas and HVAC services on rooftops, plant rooms and slab/ground runs. Lightweight yet robust, they help prevent pipe sag, reduce vibration and keep lines aligned over uneven surfaces.

Why use EPS plumber blocks

• Lightweight & fast to install – easy handling on roofs and in tight spaces
• Closed-cell EPS – water-resistant and rot-proof
• Commercial applications – plumbing, HVAC, mechanical services & ducting
• Customisable – talk to us about alternative sizes or cut-outs
• Note: For long-term outdoor exposure, protect EPS from UV (paint, capping or shielding). Not rated for structural loads—confirm requirements with your engineer.

Common uses

• Supporting chilled/condensed water, gas and waste pipes
• Spacing and levelling pipe runs over membranes, gravel or uneven substrates
• Reducing vibration transfer from mechanical plant
• Creating service saddles and stand-offs without heavy concrete blocks

Sizes (mm)

• Small Block: 300 × 300 × 100
• Large Block: 500 × 300 × 300
• Round Block: Ø300 outer × Ø110 inner × 100 thick

Specifications

• Material: Commercial-grade expanded polystyrene (EPS)
• Colour: White
• Made/Cut: Australia
• Installation: Place on clean, flat surface; secure pipes per local codes (straps/clamps not included)

What’s included

• 1 × EPS plumber block in your chosen size.