Further to my comments on Croydon Water Tower, I have found additional information regarding this tower, from a copy of “Engineering” 5th June, 1868. The etching above (click picture for a larger image) comes from Google eBooks and is accompanied by the following text on page 545, that I have transcribed here, as it is a little difficult to read:
Croydon water tower, of which we give engravings on page 543, was erected last year for the Croydon Local board of health, from the designs of Mr. Baldwin Latham C.E., the engineer for the public works of Croydon, by Mr. J.T. Chappen, contractor, of Steyning, Sussex. It was constructed in order to furnish a supply of water to the high level district of Croydon. The tower is a brick building in the Northern style, containing a reservoir in the base which will hold 94,000 gallons of water. This lower level reservoir is on the same level and in connection with the reservoir used to supply water to the low level districts of Croydon. The upper tank in the tower holds 40,000 gallons, and the supply of water for it is taken from the lower reservoir and pumped by a rotary steam engine to the high level. The summit tank is of wrought iron, and the shell is made of ¼ in. plates of iron, strengthened at the horizontal joints with T iron, and the bottom is of ¾ in. plates. The tank is supported partially on the external walls and partly on three hollow central columns, one of which serves to furnish a supply to the high level district, whilst the second forms of the rising main from the engine house, which has been constructed at the foot of the tower, and the third acts as an overflow.
Our engraving includes a perspective view, together with a vertical and two horizontal sections. From these sections the construction of the tile will clearly will be clearly seen. The basement portion forming the lower tank is 27 ft. in diameter inside, and the Water stands in it to a depth of 27 ft. In the centre is a brick pier with stone capping, forming the base of the three central columns already mentioned, and around this the bottom of the reservoir is formed by a brick invert, as above. The bottom rests upon a bed of concrete 4 ft. thick, this concrete being laid on a clay substratum at a depth of 25 ft. below the general ground level. At the bottom of the lower reservoir the walls of the tower are 5 ft. 5 in thick, and the thickness is gradually decreased to 3 ft. 6 in. at the level of the surface of the water. Above this level the thickness of the Walls is diminished from 3 ft. 2 in. at the level of the basement floor to 14 in. at the top of the tower. The lower part of the tar forming the lower reservoir is surrounded by puddle backing, as shown, this backing being carried down to the bottom of the concrete. The total height of the tower, from the bottom of the concrete to the top of the turret, is 125 ft., the top of the turret being thus 100 ft. above the general ground level. The top of the tower itself is 10 ft. lower, or 90 ft. above the ground level. The general design of the tower is exceedingly good, and it is its appearance is very effective. In conclusion, we should state that our engravings have been prepared from a photograph and drawings kindly supplied to us by Mr Latham.
This water tower is located at TQ 33052 65002.