Hydraulic Ram is a Grade II listed building in the Wrexham local planning authority area, Wales. First listed on 3 December 1996. Engine house.

Hydraulic Ram

WRENN ID
pale-glass-kestrel
Grade
II
Local Planning Authority
Wrexham
Constituency
Wrexham MP: Andrew Ranger (Lab)
Country
Wales
Date first listed
3 December 1996
Type
Engine house
Address
Hydraulic Ram, Erddig, Marchwiel
OS grid reference
SJ 324 484
Coordinates
53.02882, -3.00801
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The Hydraulic Ram is a curved red brick structure featuring a central inspection shaft that is set into the ground. At the northern end, there is an offset arch-headed opening located just below ground level, which contains an iron gate. This opening is accessed by a flight of stone steps that are positioned between walls with flat tooled stone parapets. Although it was not inspected during the 1996 survey, it is reported to contain working valves and pipes.

Local climate

Hydraulic Ram receives an average of 850 mm of rain a year. This makes it wetter than 59% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 92% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 70% of listed buildings. Of these, 20 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Detailed attributes — period, style, materials, features
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  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Cup and Saucer Grade II* 42 m
  2. Gatepiers and attached gates and railings on N drive Grade II 91 m
  3. Bridge over the Black Brook Grade II 139 m
  4. Erddig Grade I 199 m
  5. N Garden Pavilion including attached walls, alcove gatepiers and gates immediately to E of the house Grade II 201 m
  6. Sundial on main axis of the formal garden Grade II 227 m
  7. S Garden Pavilion including attached walls, alcove gatepiers and gates immediately to E of house Grade II 237 m
  8. Cupola to SE of the house Grade II 255 m
  9. Kitchen and attached laundries, bakehouse and scullery at Erddig Grade II* 255 m
  10. Pair of pinnacles in the formal garden at Erddig Grade II 261 m