MAN-HOLE VENTILATION SYSTEM
MAN-HOLE VENTILATION SYSTEM
(OP)
Dear all,
i wonder if you can help me. We currently have a public sewer/ man-hole right in the entrance to our development, 12m deep with a 3.1m diameter combined attenuation facility at the bottom. When it rains the pressure is such that it blows the lid. I have approached the water authority and they have accepted that it's their responsibility to vent the MH. However their timescales to carry out the work is not accommodating the opening of the development. i therefore need to install temporary measures. In order to minimise smells etc when pressure is low I think a valve of some sort would be appropriate (prob need to be 300 diameter given the pressures). However I do not have much experience in ventilated MH's. Can you advise please? many thanks for your help as always. Kind Regards
i wonder if you can help me. We currently have a public sewer/ man-hole right in the entrance to our development, 12m deep with a 3.1m diameter combined attenuation facility at the bottom. When it rains the pressure is such that it blows the lid. I have approached the water authority and they have accepted that it's their responsibility to vent the MH. However their timescales to carry out the work is not accommodating the opening of the development. i therefore need to install temporary measures. In order to minimise smells etc when pressure is low I think a valve of some sort would be appropriate (prob need to be 300 diameter given the pressures). However I do not have much experience in ventilated MH's. Can you advise please? many thanks for your help as always. Kind Regards





RE: MAN-HOLE VENTILATION SYSTEM
IF the concern is that the MH lid gets blown off by pressure of air or water, a manhole cover with a hinge is available.
IF the concern is odor, a diaphragm (a thin light circular metallic disc) is available that is installed directly below the manhole cover. But if the ventilation is needed to allow for pressure fluctuations within the sewer, this option might not be allowed.
RE: MAN-HOLE VENTILATION SYSTEM
RE: MAN-HOLE VENTILATION SYSTEM
RE: MAN-HOLE VENTILATION SYSTEM