Hatocot® (“Dog house”)

Product Series - Construction

Hatocot® (“Dog house”) Overview

The HATOCOT® is Japan’s No. 1 ready-to-assemble roof penetrations housing or “dog house” since 1987. Three main features of Hatocot®: 1. Easy and quick installation, 2. Easy access for maintenance, 3. Lightweight to lessen burden of building structure.
Conventionally, construction of a plumbing cover on a roof needs many complicated steps and long period of time; including: marking, form assembly, bar arrangement, concrete placement, form removal, waterproofing, and mortar finishing before laying roof slabs.

The ready-to-assemble HATOCOT® provide standardized dimensions and quality serves to shorten the planning and construction period, and contribute to reduction in waste material generated at construction sites.

Easy Installation

8 Steps to Install Hatocot® roof penetration housing (doghouse)

Product Types and Dimension

HATOCOT® Prefab solution types and sizes

P Type: Suited for pipes for different uses, including refrigerant pipes, stack vent pipes, water supply pipes, and cable ducts.
P-0: W 670 x D 670 x H 716 (Opening area max. 290 x 187)
P-I: W 920 x D 670 x H 716 (Opening area max. 540 x 187)
P-II: W 1,220 x D 670 x H 716 (Opening area max. 840 x 187)
PH Type: PH-type units are modified P-type in which the bottom part is taller by 105mm.
PH-0: W 670 x D 670 x H 821 (Opening area max. 290 x 187)
PH-I: W 920 x D 670 x H 821 (Opening area max. 540 x 187)
PH-II: W 1,220 x D 670 x H 821 (Opening area max. 840 x 187)
V Type: The V type unit is designed for multiple pipes or ducts.
V-I: W 980 x D 980 x H 1,029 (Opening area max. 600 x 500)
V-II: W 1,280 x D 1,280 x H 939 (Opening area max. 900 x 410)
VH Type: VH-type units are modified V-type in which the bottom part is taller by 105mm.
VH-I: W 670 x D 670 x H 821 (Opening area max. 290 x 187)
VH-II: W 920 x D 670 x H 821 (Opening area max. 540 x 187)
VW Type: Has a specially designed bottom body to allow combination of two or more units, providing larger total opening area.
VW-II (S) <Single-side connection>:
W 1,350 x D 1,280 x H 999 (Opening area max. 900 x 410)
VW-II (W) <Double-side connection>:
W 1,420 x D 1,280 x H 999 (Opening area max. 900 x 410)
Kindly download document to view dimensions details

Download PDF – Catalogue

Contact us to get 2D CAD data or PDF data.

Actual Application

Product Enquiry







    Hatocot® (“Dog house”)


    Showa Denko Singapore Pte Ltd will use the information you provide on this form to get in touch with you.
    We treat your information with confidentiality. For more information, visit our Privacy Policy page.
    By clicking below, you agree that we may process your information in accordance with these terms.

    I consent to the privacy policy above

    WhatsApp Chat

    Send via WhatsApp

    Sample Request







      Yes


      Showa Denko Singapore Pte Ltd will use the information you provide on this form to get in touch with you.
      We treat your information with confidentiality. For more information, visit our Privacy Policy page.
      By clicking below, you agree that we may process your information in accordance with these terms.

      I consent to the privacy policy above

      General Enquiry Form







        Showa Denko Singapore Pte Ltd will use the information you provide on this form to get in touch with you.
        We treat your information with confidentiality. For more information, visit our Privacy Policy page.
        By clicking below, you agree that we may process your information in accordance with these terms.

        I consent to the privacy policy above