[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

热水器、马桶等需要冷热切换或长期热水的场景,内管应选EPDM三元乙丙橡胶而非普通PVC,EPDM耐温可达100℃以上且抗老化,普通PVC内管遇热水会加速硬化开裂

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85%
Confidence
Long-term
Relevance
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