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Hubless Cast Iron Pipe Replacement
Replacement of corroded sanitary stacks and drainage pipework with hubless cast iron, including couplings, supports and reinstatement.
Overview
Hubless cast iron is widely used for sanitary stacks and drainage risers in Singapore because it is durable, fire resistant and notably quieter than plastic alternatives — an important consideration in residential and hotel buildings where stacks pass through occupied areas.
Over decades, cast iron pipework corrodes from the inside out. Scale builds up and reduces the bore, joints weep, and eventually sections perforate, causing leaks into the spaces below.
SPS Jetting replaces corroded cast iron stacks and horizontal runs using hubless pipe and stainless steel couplings, including removal of the old pipework, new brackets and supports, testing, and reinstatement of any hacked surfaces.
What We Do
Stack & Riser Replacement
Replacement of corroded vertical soil, waste and vent stacks in occupied and vacant buildings.
Horizontal Drainage Runs
Replacement of horizontal cast iron drainage pipework in ceiling voids, basements and plant areas.
Couplings & Supports
Installation with stainless steel couplings and correctly spaced brackets to control movement and noise.
Hacking & Reinstatement
Controlled opening of ducts, walls and ceilings for access, followed by full reinstatement.
Who This Service Is For
Commercial
Offices, malls, F&B outlets, hotels, and commercial buildings across Singapore.
Industrial
Factories, warehouses, manufacturing plants, and industrial estates.
Residential
Condominiums, HDB estates, landed properties, and town councils.
Institutional
Schools, hospitals, government buildings, and public infrastructure.
Hubless Cast Iron Pipe Replacement — Frequently Asked Questions
Common questions about hubless cast iron pipe replacement in Singapore, answered by our plumbing and drainage specialists.
What is hubless cast iron pipe and where is it used?
Hubless cast iron pipe is cast iron drainage pipe without the traditional bell-and-spigot ends. Sections are joined using stainless steel couplings with a rubber gasket, which makes installation faster and allows joints to be made in confined spaces.
It is commonly used for soil, waste and vent stacks in residential, commercial and hospitality buildings, and for horizontal drainage runs where fire performance and noise reduction matter.
How do I know if my cast iron pipes need replacing?
- Rust staining, damp patches or leaks on ceilings and walls near the stack.
- Recurring blockages caused by internal scale build-up.
- Flaking, corroded or perforated pipe visible in ducts and risers.
- Persistent drain odours from a leaking joint or crack.
- Repeated repairs to the same section of pipework.
A CCTV survey of the internal condition, combined with visual inspection of accessible sections, gives a reliable picture of whether isolated repairs are still viable or whether the run should be replaced.
Why choose cast iron instead of uPVC for a replacement stack?
Cast iron is significantly quieter, which matters where a stack runs through bedrooms, hotel rooms or offices. It is also non-combustible, which is often a requirement for stacks passing through fire compartments.
uPVC is lighter and less expensive, and is well suited to many applications. The appropriate choice depends on the location of the pipework, acoustic requirements and any fire performance requirements applying to the building.
Can pipes be replaced while the building is occupied?
Yes. Most stack replacement work in Singapore is carried out in occupied buildings. Works are staged so that sanitary fittings are out of service for the shortest practical period, usually working floor by floor.
Residents or tenants are normally given advance notice of the periods when fittings cannot be used. Access to service ducts within units must be arranged, which is typically the main scheduling constraint.
Do you reinstate walls and ducts after the works?
Yes. Where hacking is required for access, reinstatement is included — patching, screeding, tiling where applicable and making good the duct openings.
We agree the extent of reinstatement before works begin so that finishes and any tiling requirements are clear, as matching existing tiles can require materials to be sourced in advance.
Ready to Get Started?
Contact SPS Jetting for a free consultation and quote on hubless cast iron pipe replacement services in Singapore.