<Specifications> ●Waterproof performance test value (smooth inner pipe) 0.1MPa×72 hours (This product does not guarantee complete waterproofing.) ●Composition ・Sleeve material: Rigid polyvinyl chloride pipe (JIS K 6741) VU or VP ・Sleeve penetration pipe: Underground buried electric wire protection pipe, Furukawa Electric Co., Ltd. Eflex (or flame-retardant Eflex) ・Sealing material: Curing waterproof material filled in 2 locations ↓↓↓↓↓↓■Why is the waterproof performance of the pipe-in-sleeve set to "3 days"?■↓↓↓↓↓↓ ◆Local governments state that "the flood inundation depth is 1 to 3 meters, and the duration of inundation is generally half a day to 1 day, but it may vary from 1 day to 3 days depending on the location." ◆Emergency power supply systems in hospitals and similar facilities are recommended to operate continuously for "more than 72 hours (3 days)" according to laws and guidelines. ◆The time until the restoration of lifelines and the supply of relief materials is assumed to be 72 hours during a disaster. ◆Time limit for rescue operations: The time frame in which the survival rate significantly decreases for rescues from collapsed buildings is within "72 hours (the golden 72 hours)."

PIS

*R2.6 Publication of the National Transportation Document "Guidelines for Flood Prevention Measures for Electrical Equipment in Buildings" *R3.4 (Public Interest Incorporated Foundation) Japan Sewerage New Technology Organization "Promotion of Waterproofing (Final Version)" The adoption of ●● cast iron pipes is rapidly increasing in the related construction work! <Public Works / Adoption Records Excerpt> (Statistics from January to June 2026) - Osaka Prefecture ●● City) Construction of communication facilities etc. due to expansion of ●● and others - Shizuoka Prefecture ●● City) Electrical equipment construction for the ●● district center in fiscal year 7 - Kyoto Prefecture ●● City) Electrical equipment construction related to the new building construction of ●● City Hospital (Section 1) - Kanagawa Prefecture ●● City) Electrical equipment construction for the expansion of ●● Elementary School building No. 1 - ●● Prefecture Civil Engineering Department Maintenance Section) Electrical equipment construction for the new construction of (tentative name) ●● Special Support School - Aichi Prefecture ●● City) Integrated redevelopment project for ●● City School Lunch Center (For other records, please download the separate adoption record sheet) Due to the recent shortage of construction workers and skilled labor, while "easy construction" can be performed, there are also materials/methods that underestimate waterproof performance, leading to an increasing trend in water leakage issues at power supply entry points in recent years. To prevent water leakage accidents that could lead to large-scale repair work later on, we advocate for the adoption of pipe-in-sleeve systems that combine both "labor-saving at construction sites" and "ensuring the waterproof performance of buildings."