The Egg serves the Ranelagh sewer and also to a lesser degree the
King's Scholars' Pond Sewer(KSPS). Beginning at a mid-way point on the KSPS
it runs from there westwards as a 7ft, red brick, inverted egg shaped pipe, for just over a kilometre.
After 1K it passes under the Ranelagh sewer into a junction/overflow chamber where the mass of swirling brickwork
is an incredible sight.
As well as The Egg, a shorter, older stretch of storm relief tunnel also called the Ranelagh Storm Relief exists. Built
between 1861-1864 during the construction of the Middle Level Intercepting Sewer it is more intergrated with the Ranelagh proper,
rather than being a distinctly seperate tunnel as is the case with The Egg.
The Egg was constructed twenty years later, between 1883 - 85, by the M.B.W.
in response to criticism over the lack of storm outlets.
From its initial overflow junction with the Ranelagh Sewer it makes a long 90 degree turn putting it heading
south down Sloane Street towards the Thames. Around about the are of Sloane Square a section of stainless steel
pipe terminates in a circular flap that halts any further travel downstream. To continue the downstream trip to reach
The Eggs Thames end the flap must be passed above ground.
Once past the flap The Egg's course
southward is quite direct, taking a couple of turns prior to its Thames outfall where it meets with the Ranelagh Sewer one last time.
