Mullaly Tank SolutionsMost specified
Combo wet well & valve pit
Wet well and valve chamber in one shell. The smallest footprint and the fastest install.
- Diameter
- 1.5–3.75 m
- Depth
- 2–14 m
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Mullaly Tank Solutions
Fibreglass sewage pump stations
One-piece FRP wet wells, valve pits and access chambers, built to your project drawings and delivered with the pipework already fitted. Set and backfilled on site in as little as a day.
Get a price
Tell us roughly what you need. A sales engineer for your state replies within 2 business days.
Have drawings or a full spec? Use the detailed quote form, or call NSW +61 2 4964 8270 or WA +61 8 9434 1707.
Why FRP for sewage pump stations
Hydrogen sulphide in a wet well turns to sulphuric acid on every exposed surface. In a concrete station that acid reaches the reinforcing steel, and the station needs repair long before its design life is up.
A Mullaly station is laminated in one piece from premium-grade vinyl ester resin and glass. Both the liquid-side and vapour-side surfaces resist corrosion, so there is no coating to apply on site, no joints to seal and nothing to reline later.
Corrosion-proof inside and out
Vinyl ester resists the aggressive gases in enclosed wastewater environments. No sealing or coating of surfaces or fittings.
One piece, fully watertight
A homogeneous sealed unit with watertight inlet and outlet connections. No precast joints to crack or leak.
Pipework fitted in the factory
Pedestals, guide rails and all internal pipework are pre-fitted to your approved drawings before the station leaves our site.
Smaller excavation
The integral valve chamber sits inside the same shell, so there is less to dig, less shoring and less disruption on site.
Quick to install
Light enough to lift and place. Most stations are set and backfilled within 1–2 days, and some go in within a few hours.
Safer to maintain
Valves sit in their own chamber, clear of the wet well, which cuts confined-space entry for routine servicing.
Inside a combo wet well and valve pit
Every station is engineered to its site. This is the most common configuration: one FRP shell with the valve chamber built in above the wet well.
- Access covers. Aluminium hinged lids with polymer-coated safety grates, or Class B, D or G ductile iron covers for trafficked areas.
- Integral valve chamber. Cast iron or bronze valves, with scour and bypass lines if required, kept out of the wet well.
- Dismantling joint. Lets valves come out for servicing without cutting pipe.
- Watertight inlet. Connections are set to your invert levels and sealed in the factory.
- Guide rails. Pumps lift out and drop back onto their pedestals from the surface.
- Pump pedestals. Pre-fitted to suit your nominated submersible pumps.
- One-piece FRP shell. Typically 20 mm solid wall with an integrated vinyl ester corrosion barrier.
Pump station configurations
Standard diameters and depths below. Larger stations are engineered to suit the project.
Wet well
A stand-alone chamber for submersible pumps. Suits larger stations or a separate valve pit.
- Diameter
- 1.5–3.75 m
- Depth
- 2–14 m
Valve pit
Protects pipes and valves from corrosion and vandalism. Pairs with a wet well where freight limits apply.
- Standard
- 900 × 900 or 1200 × 1200 mm
- Custom
- On request
Manholes & access chambers
Combine several inflows or change a gravity line’s direction or grade. Smooth channels stop solids building up.
- Diameter
- 1.5–3.75 m
- Depth
- 2–14 m
Emergency overflow storage
FRP tanks that hold inflow during a power failure or pump outage.
- Capacity
- 5,000–150,000L
Macerators & lift stations
Macerator chambers break down solids before pumping. Lift stations are made to project requirements.
- Sizing
- To project
Specifications
Construction
MaterialFRP, one-piece
ResinPremium-grade vinyl ester
WallTypically 20 mm solid wall
Corrosion barrierIntegrated, liquid and vapour zones
DesignCertified by a practising composite materials engineer
Load resistanceInternal and external loads independently verified
Design life100 years
Warranty30 years
Fit-out & installation
Pre-fittedPedestals, guide rails, internal pipework
ValvesCast iron or bronze
OptionsScour line, bypass line, dismantling joints
Access coversAluminium hinged lids with safety grates, or Class B, D, G ductile iron
MediaSewage, wastewater, stormwater
Ground conditionsFlooded or dry excavations, with or without groundwater
InstallationTypically set and backfilled in 1–2 days
Manufactured atTomago NSW & Kwinana Beach WA
Standards & certification
| WSAA | Appraised through the Water Services Association of Australia’s national product appraisal scheme, to WSA 04 (Sewage Pumping Station Code) |
|---|---|
| RPEQ | RPEQ-certified designs supplied for Queensland projects, including Innes Estate |
| Design | Designs, manufacturing process and products certified by a third-party registered practising composite engineer |
| Councils | Specified and used by Townsville, Cairns, Tablelands, Torres Strait Island, Cassowary Coast, Whitsunday and Mackay councils. City West Water (VIC) has approved Mullaly packaged pump stations for stormwater and pressure sewer networks. |
| AS 1664 | Aluminium access covers and safety grates |
| ISO 9001 | Quality management certification at Tomago NSW and Kwinana Beach WA, through SAI Global |
Datasheets & guides
FRP vs concrete pump stations
How a one-piece Mullaly station compares with poured or precast concrete over the life of the asset.
| Criterion | Mullaly FRP | Concrete |
|---|---|---|
| Corrosion | Vinyl ester resists the corrosive chemicals in a sewage environment | Reinforcing steel corrodes under H2S attack and the sulphuric acid it produces |
| Watertightness | One homogeneous sealed unit | Potential leaks through cracks and joins between precast segments |
| Design life | 100 years, with a 30-year warranty backed by a 30-year track record | Can be designed for 100 years but often needs early repair or refurbishment |
| Install time | A few hours on some projects; typically 1–2 days | Typically weeks for an in situ concrete station, for example over six weeks on Sino Iron |
| Handling | Lightweight, with lower lifting risk and smaller cranes | Heavy lifts raise safety risk and make installation harder |
| Package | Delivered as one complete unit, often a combo with integral valve pit; no assembly on site | Sections joined on site, or poured in situ and fitted out in a confined space |
| Safety | No fit-out on site, so little need for confined-space entry | Long assembly and heavy handling; fit-out often in confined spaces |
| Ground movement | Engineered for maximum strength; allows for ground movement with no structural fatigue | Ground movement can crack sections and break seals between them |
| Maintenance | Smooth internal walls stay cleaner for longer | Rough walls need more frequent cleaning, unless lined |
| Remote sites | Installed in some of the most remote locations in Australia | Concrete supply is often unavailable, and heavy precast units are costly to freight |
| Quality control | Factory-controlled conditions, to an independent design by a registered practising composite engineer | Placement quality varies with the experience of the crew |
How a station gets to site
1
Send your spec
Drawings, invert levels, pump selection and site conditions. A sales engineer replies within 2 business days.
2
Engineering & drawings
The station is designed and certified by a composite materials engineer, and drawings come back for your approval.
3
Manufacture & fit-out
Laminated in one piece at Tomago or Kwinana Beach, with pedestals, rails and pipework fitted in the factory.
4
Delivery
By road to any site in Australia, including remote communities more than 3,000 km from our plant.
5
Set & backfill
Lift, place and backfill, then connect the external pipework and electrics. Usually 1–2 days.
Recent projects
Hundreds of Mullaly stations are in service, with no known structural failures in more than 30 years.
Sydney International Airport, Pier B
Sydney Airport needed a sewage station that could sit under an Airbus A380 parked overhead, installed with as little construction traffic on an active airfield as possible. Mullaly combined the wet well, macerator and valve pit in one FRP unit and delivered the whole system on three semi-trailers. It was lifted, placed and backfilled.
- Pump station
- 3 m combo
- Overflow storage
- 2 × 85,000L
- Deliveries
- 3 semi-trailers
- Design load
- A380 overhead
North Queensland Stadium
A 3 m × 6.2 m deep pre-fitted combo station and 110kPa FRP emergency storage tanks, installed quickly on a crowded site so the stadium opened for the 2020 NRL season. Built by Watpac for the Queensland Government.
Badu Island pump station
A fibreglass (FRP) pump station supplied in 2010 for a remote island site.
Sino Iron accommodation village
Two pre-fitted 3 m × 5 m deep combos for a mining village housing 4,000 workers, 100 km south-west of Karratha. Crane time and site labour were cut, and installation took under a week.
Innes Estate
A 4.0 m × 8.5 m deep wet well with a dividing wall forming two pump chambers, in sandy ground next to a creek. The FRP shell reduced shoring, dewatering time and excavation depth.
Ramingining sewage upgrade
Installed fully assembled 560 km east of Darwin, where labour is hard to get to site. Twenty years on, the station’s smooth internal surfaces and stainless fittings were still in near-perfect condition.
Sydney Airport waste dump
A Ø3.0 m × 5.0 m deep combo with twin Homa pumps, on reclaimed swamp land beside the Cooks River. Under an hour from being craned into the hole to backfilling.
“I would have no hesitation in recommending a Mullaly fibreglass pump station. We have been installing these for over 15 years and have found the ease of installation, combined with the reduced safety risks and excavation works required, make these units an overall cost-effective solution and great value for our clients.”
Frequently asked questions
Can’t see yours? Call our water team on +61 2 4964 8270.
Wet wells, combos and access chambers are made from 1.5 m to 3.75 m in diameter and 2 m to 14 m deep. Valve pits are 900 × 900 mm or 1200 × 1200 mm as standard. Larger stations are engineered to the project; Innes Estate, for example, has a 4.0 m wet well.
Yes. Mullaly pump stations have been evaluated through WSAA’s national product appraisal scheme, to the WSA 04 Sewage Pumping Station Code. RPEQ-certified designs are available for Queensland projects.
Most stations are set and backfilled within 1–2 days, and some take a few hours. Because the pipework is fitted in the factory, the site crew only connects external pipework and electrics. On the Sino Iron Red River village this cut installation from over six weeks to under one.
The station is designed for a 100-year service life. We warrant it for 30 years, which is the length of the Mullaly track record we can point to.
Yes. Stations are engineered for flooded or dry holes, with or without groundwater. Innes Estate went into sandy, creek-side ground that needed dewatering.
Pedestals, guide rails and pipework are fitted to suit the pumps on your approved drawings. Stations have been delivered with pumps already installed, such as the twin Homa pumps at the Sino Iron Red River village. Tell us your pump selection when you enquire.
Yes. A new FRP station can be placed next to the concrete structure it replaces, which keeps ground disturbance to a minimum.
Price a pump station
A few details up front means your quote comes back faster, from the right engineer for your state. We price each station to your drawings, with no obligation, and reply within 2 business days.
Thanks there, your enquiry is in.
Your enquiry has gone to our sales team. A sales engineer will be in touch within 2 business days.
Need it sooner? Call NSW +61 2 4964 8270 or WA +61 8 9434 1707.
Please email your drawings and documents to sales@tanksolutions.com.au with your name in the subject line, so we can add them to this enquiry.