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| Maintenance
Normally, little maintenance is required as there are no moving
parts within the Hydro-Brake® Flow Control. Experience has
shown that if blockages occur they do so at the intake, and
the cause on such occasions has been due to a lack of attention
to engineering detail such as approach velocities being too
low, inadequate benching, or the use of units below the minimum
recommended size. Hydro-Brake® Flow Controls are fitted
with a pivoting by-pass door, which allows the manhole chamber
to be drained down should blockages occur. The smaller type
conical units, below the minimum recommended size, are also
supplied with rodding facilities or vortex suppressor pipes
as standard. Following installation of the Hydro-Brake®
Flow Control it is vitally important that any extraneous material
ie. Building materials are removed from the unit and the chamber.
After the system is made live, and assuming that the chamber
design is satisfactory, it is recommended that each unit be
inspected monthly for three months and thereafter at six monthly
intervals with hose down if required. If problems are experienced
please do not hesitate to contact the company so that an investigation
may be made.
Hydro-Brake® Flow Controls are typically manufactured
from grade 304 Stainless Steel which has an estimated life
span in excess of the design life of drainage systems.
Download HBFC maintenance statement. | 
"The
problem of blocking Hydro-Brake® Flow Control number
2 was solved by obtaining a drawing of the inlet from the
manufacturers. A wooden block was then made and hammered
into position."
The above is from a WRc report on disinfection trials at
Bexhill which called for a Type CH Hydro-Brake® Flow
Control to be sealed. Several unsuccessful attempts were
made using sandbags due to the irregular shape of the inlet.
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