Storm sump pump systems for laneway houses, coach houses, duplexes, multiplexes and single-family homes — sized, drawn, stamped and sealed by a P.Eng., from the basin detail through to field review. If your municipality has asked for an engineering letter or an engineered stormwater pump design, that is what this is.
Scoped per project, but this is what a package normally includes.
Inflow, basin size and pump duty calculated for the building and the area it drains.
A general layout drawing and a storm detail, dimensioned so the installer is not guessing at the discharge route.
Two pumps where loss of the system is not acceptable, so the building still drains if one fails.
The Letters of Assurance your municipality asks for — Schedule B at permit, field review at installation, and Schedule C-B to close the job out, sealed by a professional engineer, with an installation confirmation alongside.
Projects throughout British Columbia, with most work in Metro Vancouver. What gets asked for is not the same everywhere — the District and City of North Vancouver want an approved engineered pump design and a covenant registered on title, Vancouver works to its own Building By-law, and elsewhere it is the BC Building Code and the Letters of Assurance. We design to whichever applies.
If yours is not here, call or send the drawings and we will answer directly.
Whenever part of the building cannot drain to the municipal system by gravity — typically a basement, an areaway or a below-grade entry sitting lower than the connection invert. It also comes up where the municipal storm system will not accept a gravity-fed connection from the building.
One is normal for a single-family home or a laneway house. A duplex arrangement — two pumps sharing the duty — is used where a failure would flood occupied space or where the municipality asks for standby capacity. We will tell you which applies on your project rather than defaulting to the more expensive option.
Yes, both. Schedule B at permit, field review once the system is installed, and Schedule C-B at completion, with an installation confirmation alongside it. These are the Letters of Assurance under the BC Building Code.
Yes — and it is usually one of these under a different name. Municipalities word it differently: some ask for an engineering letter, some for a stormwater or drainage compliance letter, some for an approved engineered pump design, and most want a sealed Schedule B. Engineering letters, stamped drawings, sealed designs — it is the same deliverable under different names: a sump pump system designed and sealed by a P.Eng. Send us the wording you were given and we will match it.
An approved engineered pump design, plus a Stormwater Pump Covenant registered on title under Section 219 of the Land Title Act. We provide the design and the Letters of Assurance; the covenant is registered by your conveyancer. The drainage permit itself is applied for by whoever is doing the work.
The architectural plans, a survey with grades, and the location and invert of the municipal storm connection. Where a geotechnical report exists, send that too — infiltration and rock pit decisions are set out from it.
Most projects need more than one of these, and they are coordinated together.
Tell us what you are working on and we will come back with a scope and a price — and ask for drawings if we need them.
Or reach us directly