Breaking the myth about water and electricity: 5 major mistakes made by 90% of households, professional masters will teach you the correct repair methods

Hidden Plumbing and Electrical Repair Projects: Why do 90% of households spend money in vain?

Hydropower projects are called "hidden projects". Once problems occur, they will not only affect daily life, but may also cause serious safety hazards. Senior plumbers pointed out that many homeowners often fall into misunderstandings when decorating. Only by mastering the correct method can you avoid future troubles.

Mistake 1: Blindly pursuing imported water pipes and ignoring domestic high-quality brands

Many homeowners believe that "imports = high quality". In fact, many imported water pipes on the market are overpriced and their quality is difficult to guarantee. The master revealed: The production cost may not even be half of that of domestic production!

• Correct approach: Choose a well-known brand with a good reputation. Check whether the water pipe has a "double eyelid" design. Products with tight seams are more durable.

Mistake 2: Ignoring the original wiring inspection and reinstalling the whole house

For second-hand houses that are about 10 years old, if the original water and electricity pipes are in good condition, they do not need to be completely replaced. Water pipes and lines typically have a service life of about40 years.

• Correct approach: First conduct an insulation test on the wire to confirm whether the wire diameter meets the requirements. If there are no obvious problems, partial renovation can save 30%-40% of the cost.

Mistake 3: Laying strong and weak currents on the same pipes will cause signal interference

If strong currents (power lines) and weak currents (network lines, TV cables) are laid on the same pipes, electromagnetic interference will occur, causing WiFi signal instability. This is the most common hidden danger that construction teams often bury to save trouble.

• Correct approach: Strong and weak currents must be run through pipes separately, and a distance of 30 cm or more must be maintained. Weak wires need to be wrapped with tin foil at intersections to shield them from interference.

Mistake 4: Not paying attention to the water pressure test and leaking continuously after moving in

If the water pressure test fails and the construction continues, future water leakage will cause the floor to soak and the downstairs to flood, which will cause extremely high maintenance costs.

• Correct approach: After installation, a 0.6-0.8MPa pressure test must be carried out for more than 30 minutes. The pressure drop does not exceed 0.02MPa to be considered qualified.

Mistake 5: Opening horizontal grooves at will will damage the structural safety of the house

Opening horizontal grooves at will on the load-bearing wall will seriously affect the frame of the house. Regulations prohibit the opening of horizontal grooves in load-bearing walls.

• Correct approach: Only vertical grooves are allowed in load-bearing walls, and the length shall not exceed 30 cm. The length of transverse grooves in non-load-bearing walls shall not exceed 50 cm.

Professional advice: 3 things you must do before water and electricity repairs

1. Confirm needs: Determine the model of home appliances (such as flush toilets and air conditioner locations) in advance.
2. Sign a clear contract: Agree that the difference between the actual cost and the estimate will not exceed 5%-10%.
3. Full process supervision and acceptance: Take photos to record the direction of the pipeline as a basis for future maintenance.

"Water and electricity are the blood vessels of the house. Once there is a problem, the entire home will be paralyzed." - Only by treating it with caution can you live with peace of mind.

New knowledge on air conditioning power consumption and Taiwan climate maintenance regulations in recent years (2025-2026 current situation)

With the high temperatures in summer breaking historical records and the adjustment of electricity price structure in recent years, the latest statistics from the Energy Administration of the Ministry of Economic Affairs show that air-conditioning equipment accounts for more than 47% of residential electricity consumption in summer. Many people mistakenly believe that if the air conditioner is not cold, they only need to "replenish the refrigerant." However, in fact, refrigerant is not naturally consumed during normal operation in a closed circuit. If the refrigerant is insufficient, it means that there are micro leaks in the copper pipes or joints. Simply replenishing the air conditioner will only treat the symptoms but not the root cause. Refrigerant leakage will aggravate the high temperature overload of the compressor and shorten its service life.

According to Taiwan's standard operating specifications for air-conditioning projects, it is recommended that professional technicians with a refrigeration and air-conditioning decoration technician license perform "full machine high-pressure water washing and evaporator deep sterilization" every 1 to 2 years for detached air-conditioning indoor units. Especially in the humid summer in the Shuangbei Basin, the air drum and water collection tray are easy to breed black mold and jelly-like biofilm. This is also the main reason for the sour smell in the air-conditioning outlet and the backflow of the drainage pipe. Regular maintenance can maintain CSPF (Air Conditioning Seasonal Performance Factor) level one energy efficiency level, which can save an average household 15% to 20% of air conditioning electricity bills every year.

Autonomous simple maintenance vs professional maintenance safety red line

• Homeowners can do by themselves: Remove and clean the nylon filter regularly every 2 to 3 weeks (rinse with clean water and dry in a cool place, do not expose it to the sun to avoid deformation and embrittlement); clean the air outlet blades of the indoor unit with a dry cloth; check whether there is any accumulation of debris within 50 cm around the outdoor unit that hinders heat dissipation.
• Professional technicians must be entrusted according to regulations: Refrigerant pressure testing and leakage repair welding, high-pressure cleaning of indoor unit air drums and aluminum fins with liquid chemicals, reset of the drainage slope of hidden cold water pipes in the ceiling, and 220V dedicated power circuit configuration and leakage circuit breaker replacement.