Licensed Plumber San Jose
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License #825685
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Drain Cleaning
Checking the Clean Out
Main Drain Backs Up
Kitchen Drain Backs Up
Laundry Backs Up
Toilet Backs Up
Tub Drain Backs Up
Shower Drain Backs Up
Slow Lavatory
Garbage disposal
& dishwasher
Why do we need the airgap
for dishwasher
Drain leaking at the Dishwasher
Why the garbage
disposal is jammed
Why do we need the airgap
for dishwasher
Water heater repairing
& Installation
Water Heater Cleaning
No hot water in the water heater
Water heater leaking
Combustion air requirement
Water heater installation
Tankless Water Heater
DRAIN REPAIRING
& INSTALLATION
Sewer Line Repairing
Kitchen Line Repairing
Tub Drain Repairing
Installing a Clean Out
Faucet repairing
& Installation
One handle shower faucet
Two handle shower faucet
Faucets for the kitchen
Faucet for the lavatory
Changing hose bib on the
copper pipe line
Gas Line repairing
& Installation
The character of each gas, Natural, Propane and Butane gas
Why is the gas line pipe size important?
Inspection method of gas line leaking
How to install the gas line on the ground, under the ground and under the concrete
Water line repairing& Installation&
Galvanized Steel line
Copper line
Propylene line
Strange sound from the water line
High water pressure
Low water pressure
Useful tip after shut main valve off Repairing the gate valve
  Gas Line Repairing & Installation
Air
Natural gas Propane gas Butane gas
1 0.60 ~0.62 1.53
2.0

As you can see at above table, natural gas which we are using regularly is lighter than air but Propane or Butane gases are heavier than air. So it is recommendable to do Propane or Butane gas work at outside of the building. If you have to do Propane or Butane gas work in the building, you have to have enough time to remove all the air in the room before firing the gas appliances.

  Why is the gas line pipe size important?
The pipe size of gas line is decided by the total BTU and the distance of the farthest gas appliance from the meter. If the gas is not supplied enough because of less capacity of the pipe, the fire of the appliance will be off but gas will be supplied continuously and this supplied gas will be the cause of the explosion.
  Inspection method of gas line leaking
California Plumber
Spraying the soap water on the joint part.


The soapy water is showing the gas leaking by bubbling like left side picture.
  How to install the gas line on the ground, under the ground and under the concrete
On the ground
All exposed gas piping shall be kept at least 6" above grade or structure to prevent mechanical damage from lawn mowers and rakes.
San Jose Plumber
Under the ground
pipe should be wrapped by plastic tape to prevent rusting. So you need to use a plastic coated pipe and wrap at the threaded parts.
Licensed Plumber CA
Under the concrete
A.Provide channel or recess in slab. Use removable cover plate.

B. Pipe in conduit sealed at floor
level with vent outside at least 6"(152mm) above grade.

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