In the greater Taipei area, old apartments are the first choice for many people to buy houses, especially the old communities in Zhongyonghe, Banqiao, Sanchong, and Daan and Xinyi Districts in Taipei City. These houses have a low public utility ratio and practical space, but there are often hidden safety risks that cannot be ignored - water and electricity pipelines that are more than 30 or even 40 years old. When many homeowners renovate old houses, the most common decision they face is: Should they knock open the walls and re-draw the "hidden pipes", or replace the exposed "exposed pipes"? This is not only an aesthetic consideration, but also involves a budget gap of hundreds of thousands of dollars and future residential safety. This article will give you an in-depth analysis of the advantages and disadvantages of these two construction methods, the reasonable market budget in Taipei, and the pitfalls that you must not step into when planning hydropower.
A common nightmare in old houses in both north and south: the potential crisis of aging pipelines
When many old apartments were first built, household electricity consumption was far less than it is now. At that time, the wire specifications were mostly 1.2mm or 1.6mm, and the total capacitance might only be 30A or 50A. However, modern homes are filled with energy-consuming appliances such as air conditioners, microwaves, dishwashers, dryers, and even dehumidifiers and flush toilets. When the wires are aging and the insulation is brittle, overloading the electrodes can easily cause electrical tripping or even fire. In terms of water supply and drainage, galvanized iron pipes were mostly used in the early days. After decades of water erosion and oxidation, rust and nodules have already formed in the pipes. Not only does the water pressure decrease and red water flows out, but water may seep into the walls at any time, causing the most troublesome water leakage disputes among neighbors. Therefore, when renovating an old house, redundancy of water and electricity throughout the house is definitely the highest-priority basic project.
The essential difference between exposed pipes and concealed pipes: construction and future maintenance
The so-called "concealed pipes" are water pipes and electrical wires buried in cement walls or floors. This construction method is most in line with traditional aesthetics. After completion, the wall will be clean and flat, and no pipelines will be visible at all. However, the construction of concealed pipes requires multiple processes such as wall digging, piping and wiring, cement filling (mud work), soil application and painting. If water leakage or wire short-circuit occurs in the future, the wall must be opened again to locate and repair, which is time-consuming and labor-intensive and will damage the decoration.
In contrast, "exposed pipes" lay pipelines along the surface of walls and ceilings. Open pipes usually use EMT metal pipes, PVC hard pipes or metal hoses to protect wires. Since there is no need to destroy the wall, the construction speed is extremely fast. The most important thing is that if you need to repair or add new sockets in the future, you only need to directly remove the pipe cover to deal with it. The leakage problem can also be visually detected at the first time, preventing sewage from seeping into the neighbors downstairs.
Budget Showdown: Actual Cost Comparison of Exposed Pipes and Concealed Pipes
In the greater Taipei area, due to the increasing cost of labor, materials and cleaning and transportation year by year, the cost of hydropower construction is considerable. Let's take an old apartment of 30 square meters with two bathrooms and one kitchen as an example to compare the budget difference between exposed pipes and concealed pipes:
1. Traditional concealed pipe construction method: Re-drawing of water and electricity pipes in the whole house (including water supply and drainage, strong and weak electricity), plus wall construction, waste removal, mud filling and paint restoration, the reasonable price in Taipei is about NT$ 280,000 to NT$ 450,000between. Among them, nearly one-third of the budget is actually spent on non-water and electricity core wages such as "wall construction, clearing and transportation, and soil replenishment."
2. Exposed pipe design and construction method: Since a lot of wages for wall construction and cement repair are saved, the main expenditure of the exposed pipe project lies in the fine piping technology and the pipe itself. For the same number of square meters and layout, the cost of open-pipe water and electricity projects is approximatelyBetween NT$ 150,000 and NT$ 250,000. If the ceiling is originally intended to be made of wood to hide the pipelines, it can further reduce the complexity of wall piping. Overall, choosing exposed ducts can save homeowners approximately 35 to 50 percent of their foundation project budget.
Breaking the traditional myth: Can exposed pipes only have a rough industrial style?
When many homeowners hear the idea of open pipes, they immediately picture messy images of factories or cheap rental apartments in their minds. In fact, modern interior design has developed exposed pipes into an aesthetic genre. For example:
Industrial Style: Directly use matt black or galvanized silver EMT metal bent pipes, match them with track lights and cement pink walls to show the beauty of clean lines.
Nordic Muji Style: Use white PVC Japanese-style wire ducts that are consistent with the color of the wall, and run them horizontally and vertically along the skirting board or corner, which can almost achieve the effect of visual invisibility.
Partial wood concealment: Hide the main large pipelines in the ceiling or false beams, and only pull down the delicate metal exposed pipes partially on the wall where sockets are needed, which not only retains the beauty, but also allows for convenience in maintenance.
Four key points to avoid pitfalls in water and electricity planning in old houses in Greater Taipei
Whether you choose exposed pipes or concealed pipes in the end, the following four safety-related planning details must not be compromised:
1. Apply for an increase in total power capacity: The electrical boxes in old apartments in Taipei are often not enough. When reconnecting water and electricity, be sure to ask a qualified plumber to apply to Taipower to increase the total capacitance to 75A or 100A, and replace it with a new household distribution box and non-fuse switch (NFB).
2. Configure "dedicated circuits" for kitchens and bathrooms: High-power appliances such as microwave ovens, ovens, dishwashers, and instantaneous electric water heaters must have independent circuits and dedicated lines (2.0mm or 5.5mm² specification lines are recommended). They must not be shared with general sockets, otherwise it will be easy to trip when using a hair dryer or microwave oven.
3. Install a leakage circuit breaker: In areas prone to moisture such as kitchens, balconies, and bathrooms, it is mandatory to install a "leakage circuit breaker" on the socket circuit, which will automatically cut off the power within 0.1 seconds of a slight leakage to protect your family from the risk of electric shock.
4. Refusal of ambiguous words "one type" in the quotation: Before signing a contract, be sure to ask the supplier to provide a detailed bill of materials. For example: wire brands and specifications (such as Pacific Wire and Cable 2.0mm), water pipe materials (such as Nanya PVC pipes, SUS304 stainless steel hot water pipes), socket quantity and unit price. Only by clearly writing down the upper limit of the additional budget can you avoid being asked for sky-high additional funds when the project is completed.
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.
