Sewer ventilation column at the junction of Carshalton Road and Harrow Road is a Grade II listed building in the Sutton local planning authority area, England. First listed on 23 April 2020. Sewer ventilation column.

Sewer ventilation column at the junction of Carshalton Road and Harrow Road

WRENN ID
strange-outpost-rush
Grade
II
Local Planning Authority
Sutton
Constituency
Carshalton and Wallington MP: Bobby Dean (LD)
Country
England
Date first listed
23 April 2020
Type
Sewer ventilation column
OS grid reference
TQ 272 642
Coordinates
51.36306, -0.17424
Source
Historic England listing

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

Description

The sewer ventilation column, built between 1896 and 1903, was constructed by W Macfarlane & Co based on a design by Baldwin Latham. It is one of about 28 such columns remaining in Carshalton. Made of cast iron, the cylindrical column stands approximately 9 meters tall and consists of two joined lengths of pipe connected by a flanged joint. It rests on a circular, decorative, moulded plinth. At the top, the column features a Corinthian-type capital, supporting the ventilation apparatus. This apparatus includes an ornate arrow, which may either orient the vent into the wind or indicate the sewer's direction, along with a ball that has four projecting circular vents, a filigree crown, and a finial. While there is no visible manufacturer stamp on this column, several similar examples in Carshalton bear the name ‘W MACFARLANE & CO GLASGOW’.

Local climate

Sewer ventilation column at the junction of Carshalton Road and Harrow Road sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 82% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 81% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 54% of listed buildings. Of these, 15 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.

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