backwater valves

7/25/2019 Backwater Valves

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Backwater Valves andBackwater Valves and

Sewage Backflow PreventionSewage Backflow Prevention

An Information WorkshopAn Information WorkshopPresented byPresented by

Sponsored by

Drainage Services Branch


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OUTLINEOUTLINE

Function of Backwater ValvesFunction of Backwater Valves

Location of Backwater ValveLocation of Backwater Valve Types/ModelsTypes/Models

MaintenanceMaintenance

InstallationInstallation

Resources and Contact InformationResources and Contact Information

Shopping TipsShopping Tips Potential CostPotential Cost

QuestionsQuestions


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Function ofFunction of

Backwater ValvesBackwater Valves Provides protection against backflowProvides protection against backflow

of sewage into homeof sewage into home

Allows for free flow of air and outflowAllows for free flow of air and outflowof sewage (Normally open backwaterof sewage (Normally open backwatervalve)valve)


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Location of Main Building Sewer Backwater ValveLocation of Main Building Sewer Backwater Valve


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Location of Branch BackwaterLocation of Branch Backwater

ValveValve

=

Sink

FloorDrain

Clean Out

BuildingDrain

MainWasteStack

BranchBackwaterValve

BranchBackwaterValve


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AdaptAdapt--aa--Valve Backwater ValveValve Backwater Valve


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Types of Backwater ValvesTypes of Backwater Valves

FioFio Backwater Valve Open (NormallyBackwater Valve Open (Normally

open)open)


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FioFio Backwater Valve ClosedBackwater Valve Closed


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Mainline Backwater ValveMainline Backwater Valve NormallyNormally

OpenOpen


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Branch Line Backwater ValveBranch Line Backwater Valve Normally ClosedNormally Closed


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Types of Backwater ValvesTypes of Backwater ValvesBranch Line Backwater ValveBranch Line Backwater Valve

Normally ClosedNormally Closed

Protection fromReverse Flow


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Backflow protection for weeping tileBackflow protection for weeping tileconnectionconnection does not protect buildingdoes not protect building

sewer.sewer.


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Individual floor drain protectionIndividual floor drain protection


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Individual floor drain protectionIndividual floor drain protection

location:location:


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MaintenanceMaintenance

Annually check valve for freeAnnually check valve for free

movement of all moving partsmovement of all moving parts Clean away any debris that mayClean away any debris that may

have accumulated inside the traphave accumulated inside the trap If uncertain about valves conditionIf uncertain about valves condition

contact a plumbercontact a plumber


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InstallationInstallation -- RetrofitRetrofit

A retrofit will require uncovering theA retrofit will require uncovering thebuilding sewerbuilding sewer

This entails some concrete removalThis entails some concrete removalaround the area of installationaround the area of installation

Once installed the cover of the backwaterOnce installed the cover of the backwatervalve must be accessible for servicingvalve must be accessible for servicing

Some manufacturers require that theSome manufacturers require that the

closest branch connection upstream of theclosest branch connection upstream of thebackwater valve must not be closer than 2backwater valve must not be closer than 2feet (due to turbulent flow)feet (due to turbulent flow)


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InstallationInstallation -- NewNew

The National Plumbing Code requires aThe National Plumbing Code requires abackwater valve to be installed on allbackwater valve to be installed on all

new buildings when you have fixturesnew buildings when you have fixtures

installed below the adjoining streetinstalled below the adjoining street(Fixtures subject to backflow).(Fixtures subject to backflow).

The City of Edmontons bylaw #9425 alsoThe City of Edmontons bylaw #9425 alsoreflects this requirement.reflects this requirement.


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InstallationInstallation -- NewNew

If the backwater valve is installed whenIf the backwater valve is installed when

the home is being built it affords thethe home is being built it affords theowner some choices of type:owner some choices of type:

1. Normally open1. Normally open to protect the entireto protect the entirebuilding. Installed in the building sewer.building. Installed in the building sewer.

2. Branch2. Branch installed on the branch servinginstalled on the branch serving

the fixtures connected to that branch.the fixtures connected to that branch.


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Resources and ContactsResources and Contacts

Mechanical Contractors Association ofMechanical Contractors Association ofAlbertaAlberta

(403) 250(403) 250-- 7237 17237 1--800800--251251--06200620

http://http://www.mcaalberta.comwww.mcaalberta.com//

Edmonton Better Business BureauEdmonton Better Business Bureau

(780) 482(780) 482--23412341

http://http://www.edmonton.bbb.orgwww.edmonton.bbb.org//
http://www.mcaalberta.com/http://www.mcaalberta.com/http://www.mcaalberta.com/http://www.mcaalberta.com/http://www.mcaalberta.com/http://www.mcaalberta.com/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.edmonton.bbb.org/http://www.mcaalberta.com/http://www.mcaalberta.com/http://www.mcaalberta.com/


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Resources and ContactsResources and Contacts

Alberta Municipal AffairsAlberta Municipal Affairs (780) 427(780) 427--27322732http://http://www.municipalaffairs.gov.ab.cawww.municipalaffairs.gov.ab.ca//

City of Edmonton Drainage ServicesCity of Edmonton Drainage Services

www.edmonton.ca/floodpreventionwww.edmonton.ca/floodprevention// Planning & Development Inspection DepartmentPlanning & Development Inspection Department

(780) 496(780) 496--31003100

Backwater Valve subsidy programBackwater Valve subsidy program (780) 496(780) 496--56625662 Customer Service CentreCustomer Service Centre (780) 496(780) 496--55415541

Drainage and Sewer Trouble LineDrainage and Sewer Trouble Line (780) 496(780) 496--17171717
http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/http://www.edmonton.ca/floodprevention/http://www.edmonton.ca/floodprevention/http://www.edmonton.ca/floodprevention/http://www.edmonton.ca/floodprevention/http://www.edmonton.ca/floodprevention/http://www.edmonton.ca/floodprevention/http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/http://www.municipalaffairs.gov.ab.ca/


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SHOPPING TIPSSHOPPING TIPS

Get 3 quotes from differentGet 3 quotes from different

contractorscontractors Seek out referencesSeek out references from thefrom the

company or personal references fromcompany or personal references from

people who have done business with apeople who have done business with a

contractorcontractor

Make sure contractor is licensed toMake sure contractor is licensed towork in Edmontonwork in Edmonton


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SHOPPING TIPSSHOPPING TIPS

Hold back a percentage of paymentHold back a percentage of payment

until the job has been subject to Cityuntil the job has been subject to CityInspection and approvedInspection and approved

Ask the plumber to show you how toAsk the plumber to show you how to

maintain your new backwater valvemaintain your new backwater valve Check your home insurance to see ifCheck your home insurance to see if

you are required to have ayou are required to have abackwater valve installed in order tobackwater valve installed in order tobe covered for sanitary backupbe covered for sanitary backup


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Potential CostPotential Cost

Price range of $900.00 to $1700.00Price range of $900.00 to $1700.00

Includes Breaking up of concrete,Includes Breaking up of concrete,installation of backwater valve,installation of backwater valve,refinishing of concrete and removalrefinishing of concrete and removal

of all debrisof all debris Price may be subject to increase ifPrice may be subject to increase if

unforeseen circumstances ariseunforeseen circumstances arise --i.e. piping severely degraded, blockages ori.e. piping severely degraded, blockages ordamage to piping.damage to piping.


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QuestionsQuestions

Thank you for your timeThank you for your time

and attentionand attention

We hope that you haveWe hope that you havefound this informationfound this information

helpfulhelpful

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