7. We also recommend building a one metre cubed leaf collection chamber with
manhole between the tank and the soakaway. If the inlet and outlet are close to the
top of this collection chamber then bulky leaves will drop into the chamber and can be
cleaned out of the chamber through the manhole every autumn. The soakaway then
does not clog up with leaves.
Soakaway options
1 ) L as t me tr e o f pip e in to th e ta nk an d fi rs t me tr e a ft er th e ta n k s ho u ld ha ve 2 -5 % dr op t o e n su re f low ov er t he fi lter .
2 ) If th e pr op e rt y is su r ro u nd ed b y tre e s, fit a d e br is an d le af co llec to r (b re e ze b loc ks or b ric k, sa y 1 me tr e cu be d , w ith
ma n ho le ) b e fo re th e so ak aw ay .
3 ) If th e ra in wat er s to ra g e t an k do e s n ot r un o u t to a ma in d ra in, th e so ak aw ay mu st ha ve c ap ac ity to e ns ur e wa te r do es n ot
b a ck up t o the le a f f ilte r i n th e t op o f t he s to ra ge t an k, ot he r wise d e br is will flow in to th e st or ed r ai nw ate r . Soa ka wa y ca n be
c ylin d ric al c on cr e te pip in g 80 o r 10 0 cms di ame ter , bo re h o le or a ny fo r mat bu t sh ou ld b e 1 t o 2 times th e vo lu me o f th e
r a inw at er st or ag e ta n k
2 ) De bris a nd le af c olle c tor
if prope rt y s urrounde d by
tre es . E mpty ma nual ly if
re quired
3) Soa ka w a y i n any f ormat
s hould be bi g e nough t o
pre ve nt st ormwa t er
ba c ki ng up to the
ra inwa t er s t ora ge ta nk
1 ) Las t me tre of pi pe into the
ta nk and f irs t met re a ft er t he
t ank s hould ha ve 2 -5 % drop t o
ens ure f low ov er the f ilt er
© 2011 Rainwater Harvesting Ltd - All rights reserved.
Carat with Optimax and Rain Director or Mains Backup
RWH 042
Rain Director
®
and Mains Backup in a Box
®
are registered Trade Marks and may not be used without permission.
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