At the western end of the site is the pump house.
It houses the 1861 engine which was built by Easton and Amos of London, to a design patented in 1858 by Charles Amos.
It is a twin-cylinder, vertical condensing engine, driving a centrifugal pump developed by John Appold.
A similar engine was on display at The Great Exhibition of 1851 and was shown to be able to lift 100 tons of water per minute, to a height of 6 feet (1.8 m).
The engine was originally powered by Cornish boilers, but these were replaced in with 1914 Lancashire boiler, with two fire tubes, made by Fred Danks.
The boiler is beyond economic restoration.

In addition to the Easton and Amos pump, a collection of steam and diesel engines with connections either to the area or to pumping have been assembled on site and regular steam days are held.
The oldest item dates from the early 19th century, through to several Victorian engines and onward to the 20th century.
These are housed in several different buildings and areas: the exhibition hall, the courtyard, the "wiggly shed", the pump room and the engine house itself.
Most of the machines are in running order, although some are still awaiting restoration.

Steam is provided by an elderly Marshall portable boiler – essentially a portable engine without the actual engine.
It was built in Gainsborough, Lincolnshire in 1938 before being used by Thames Water as a stand by steam generator.
It was given to Kew Bridge Steam Museum (now the London Museum of Water & Steam) before being passed on to the Westonzoyland Museum and then restored with a grant from the Preservation of Industrial and Scientific Materials Foundation (PRISM).
The boiler provides steam at 50 Pounds per square inch (psi) to the other exhibits.
It has been fitted with two whistles, one from Wattstown and the other from Ty Mawr Collieries in Wales, both of which were donated by the National Coal Board.
Along with the boiler in the outdoor courtyard area are a waterwheel pump unit built by G. H. Harris of Wadebridge, a Lee Howl pump and Lister deep well pump.

Engines by a range of other manufacturers are on display.
These include 'quick revolution' engines by Belliss and Morcom, Robey & Co., Easton and Johnson and Sissons.
There are horizontal engines by W. and F. Wills and by J. Culverwell, of Bridgwater.
The Culverwell machine is a horizontal single cylinder steam engine originally used in Holt's Brewery at Burnham-on-Sea, while the Wills engine was used in a brickworks.

Additional exhibits include two small de Laval steam turbines by Greenwood & Batley, and a small 'Wessex' steam turbine milk bottle washer.
A winch used to move railway wagons at Hemyock Dairy near Wellington was built by J. Lynn of Sunderland.
There is a runnable Crossley diesel engine dating from 1935.
There is a Spirax Sarco 'Ogden pump' used to pump condensate from steam lines.
The collection includes the boiler which powered the Telescopic Bridge, Bridgwater.

Westonzoyland Light Railway is a short 2 ft (610 mm) narrow-gauge railway running alongside the pumping station.
It was constructed after the closure of the pumping station to move heavy machinery around the site and is used to transport timber from the wood pile to the boiler.
The engines used are a Simplex diesel locomotive, built in 1968, which was previously at the Minworth Sewage Treatment Works in Sutton Coldfield and a 1949 Lister rail-truck previously used by the Eclipse Peat Company at Ashcott.
A steam winch built by John Lynch of Sunderland is used to move one of the trucks up an inclined plane to demonstrate how this would have been done in goods yards and docks.
At the western end of the site is the pump house. It houses the 1861 engine which was built by Easton and Amos of London, to a design patented in 1858 by Charles Amos. It is a twin-cylinder, vertical condensing engine, driving a centrifugal pump developed by John Appold. A similar engine was on display at The Great Exhibition of 1851 and was shown to be able to lift 100 tons of water per minute, to a height of 6 feet (1.8 m). The engine was originally powered by Cornish boilers, but these were replaced in with 1914 Lancashire boiler, with two fire tubes, made by Fred Danks. The boiler is beyond economic restoration.
In addition to the Easton and Amos pump, a collection of steam and diesel engines with connections either to the area or to pumping have been assembled on site and regular steam days are held. The oldest item dates from the early 19th century, through to several Victorian engines and onward to the 20th century. These are housed in several different buildings and areas: the exhibition hall, the courtyard, the "wiggly shed", the pump room and the engine house itself. Most of the machines are in running order, although some are still awaiting restoration.
Steam is provided by an elderly Marshall portable boiler – essentially a portable engine without the actual engine. It was built in Gainsborough, Lincolnshire in 1938 before being used by Thames Water as a stand by steam generator. It was given to Kew Bridge Steam Museum (now the London Museum of Water & Steam) before being passed on to the Westonzoyland Museum and then restored with a grant from the Preservation of Industrial and Scientific Materials Foundation (PRISM). The boiler provides steam at 50 Pounds per square inch (psi) to the other exhibits. It has been fitted with two whistles, one from Wattstown and the other from Ty Mawr Collieries in Wales, both of which were donated by the National Coal Board. Along with the boiler in the outdoor courtyard area are a waterwheel pump unit built by G. H. Harris of Wadebridge, a Lee Howl pump and Lister deep well pump.
Engines by a range of other manufacturers are on display. These include 'quick revolution' engines by Belliss and Morcom, Robey & Co., Easton and Johnson and Sissons. There are horizontal engines by W. and F. Wills and by J. Culverwell, of Bridgwater. The Culverwell machine is a horizontal single cylinder steam engine originally used in Holt's Brewery at Burnham-on-Sea, while the Wills engine was used in a brickworks.
Additional exhibits include two small de Laval steam turbines by Greenwood & Batley, and a small 'Wessex' steam turbine milk bottle washer. A winch used to move railway wagons at Hemyock Dairy near Wellington was built by J. Lynn of Sunderland. There is a runnable Crossley diesel engine dating from 1935. There is a Spirax Sarco 'Ogden pump' used to pump condensate from steam lines. The collection includes the boiler which powered the Telescopic Bridge, Bridgwater.
Westonzoyland Light Railway is a short 2 ft (610 mm) narrow-gauge railway running alongside the pumping station. It was constructed after the closure of the pumping station to move heavy machinery around the site and is used to transport timber from the wood pile to the boiler. The engines used are a Simplex diesel locomotive, built in 1968, which was previously at the Minworth Sewage Treatment Works in Sutton Coldfield and a 1949 Lister rail-truck previously used by the Eclipse Peat Company at Ashcott. A steam winch built by John Lynch of Sunderland is used to move one of the trucks up an inclined plane to demonstrate how this would have been done in goods yards and docks.
Westonzoyland Pumping Station Museum