S-trap toilet and P-trap toilet: functional comparison and analysis of advantages and disadvantages
Time:
2025-03-20
The text compares S-trap and P-trap toilets in terms of functionality, advantages, and disadvantages. P-trap toilets offer space optimization, silent discharge, and clean efficiency but have high installation and maintenance costs. S-trap toilets are cost-effective, easy to install and maintain, but create hygiene dead angles and produce more noise. Suggestions for choosing: P-trap suits modern, small apartments or high-end hotels; S-trap is ideal for old house renovations or cost-sensitive scenarios.
S-trap toilet and P-trap toilet: functional comparison and analysis of advantages and disadvantages
1. Comparison of core functions
| Functional dimension | P-trap toilet | S-trap toilet |
| Drainage way | Horizontal blowdown The pipe is embedded in the wall and has strong concealment | Vertical blowdown The pipeline goes straight underground, the structure is direct |
| Installation adaptability | The pipe in the wall needs to be embedded, and the wall thickness is ≥20cm Suitable for drainage transformation of the same floor | Depends on the floor reserved holes Suitable for traditional building structure, low installation threshold |
| Maintenance complexity | Need to break the wall to repair the pipeline, the cost is high | The pipeline is exposed, can be repaired directly, and the maintenance cost is low |
| Deodorant property | S-type water trap inside the wall, water seal height ≥50mm | Traditional S-type water trap, water seal height ≥50mm |
2. Comparison of advantages and disadvantages
P-trap toilet
Advantages:
Space optimization: The suspended design releases the ground space, suitable for small apartment or minimalist style;
Clean and efficient: no base hygiene dead Angle, reduce more than 80% of bacteria breeding areas;
Silent discharge: the pipe in the wall is silenced, and the noise is reduced by 30%-50%;
Free layout: The position of the toilet can be adjusted flexibly (under the drainage condition of the same layer).
Disadvantages:
The installation is complicated: the pipeline needs to be embedded, and the construction period is long (3-5 days longer);
High maintenance cost: the failure needs to destroy the wall, and the single maintenance cost is 2-3 times higher than the row;
Expensive: the overall cost is 40%-60% higher than that of the ground (including hidden works);
Load-bearing limit: The wall must be reinforced. The maximum load-bearing capacity is no more than 400kg.
S-trap toilet
Advantages:
Convenient installation: direct docking reserved sewage outlet, ordinary workers can complete;
Simple maintenance: the pipe is exposed, dredging or replacing parts without damaging the structure;
Low cost: the price is close to the people, suitable for families with limited budgets;
Strong adaptability: compatible with more than 90% of traditional buildings, the first choice for the renovation of old houses.
Disadvantages:
Sanitary dead Angle: the edge of the base is easy to mold, and the cleaning frequency needs to be increased by 2-3 times;
Space pressure: the base covers an obvious area, and the small apartment is crowded;
Difficult to shift: need to install a shifter (more than 15cm May be blocked);
Noise is obvious: the sound of direct flushing water is larger, and it may disturb people at night.
3. Choose suggestions
P-trap toilet：
Demand: high appearance level, small apartment, modern decoration style;
Scene: Newly installed residence, same floor drainage apartment, high-end hotel;
S-trap toilet:
Requirements: pragmatic, easy to maintain, cost sensitive;
Scene: Old house renovation, rental house, traditional decoration style;
Related information
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