Abstract: A method of installing an exhaust tube is implemented by inserting an exhaust tube into an exhaust pipe that leads from the inside of a building to the outside thereof. Utilizing an already-placed exhaust pipe, a new exhaust tube is inserted into this exhaust pipe. The exhaust tube is installed according to a procedure of: performing, on the inside of the building, an operation of inserting a new exhaust tube into the already-placed exhaust pipe; performing, on the outside of the building, an operation of fixing the inserted exhaust tube to the exhaust pipe; and performing, on the inside of the building, an operation of connecting the fixed exhaust tube to an exhaust vent of a combustion apparatus.

Abstract: A closing member includes an annular portion and a flange portion. The annular portion is provided with a through hole and is in contact with an outer circumferential surface of an exhaust tube in at least a part of the through hole. The flange portion extends from an outer circumferential surface of the annular portion toward an outer side and is larger in outer diameter than an exhaust pipe. The flange portion contacts a tip end portion of the exhaust pipe on outside of a building so as to close a gap between the exhaust pipe and the exhaust tube. The flange portion is formed to protrude toward an outer side such that an entire circumference of the flange portion extends beyond an outer circumferential surface of the tip end portion of the exhaust pipe.

Abstract: An exhaust structure for combustion apparatus includes an exhaust tube connected to a water heater, an exhaust pipe through which the exhaust tube is introduced, and an exhaust tube fixing member for fixing a position of the exhaust tube relative to the exhaust pipe. The exhaust tube fixing member includes a first fixing portion having a cylindrical shape and fixed to the exhaust tube, and an attaching portion connected to the first fixing portion and attached to the exhaust pipe. The attaching portion have a first cylindrical portion having a first inner diameter D2, and a second cylindrical portion having a second inner diameter D3 smaller than the first inner diameter D2 of the first cylindrical portion.

Abstract: A method of installing an exhaust tube is implemented by inserting an exhaust tube into an exhaust pipe that leads from inside of a building to outside thereof. A support portion of an insertion jig is introduced into a through hole from a side of one end portion of the exhaust tube, and a projection of the support portion is engaged with a recess of the exhaust tube, so that the insertion jig is fixed to the exhaust tube. An end of the exhaust tube on the side of the one end portion having the insertion jig fixed thereto is inserted into the exhaust pipe, and the exhaust tube is pushed from inside of the building to outside thereof.

Abstract: A method of installing an exhaust tube is implemented by inserting an exhaust tube into an exhaust pipe that leads from the inside of a building to the outside thereof. Utilizing an already-placed exhaust pipe, a new exhaust tube is inserted into this exhaust pipe. The exhaust tube is installed according to a procedure of: performing, on the inside of the building, an operation of inserting a new exhaust tube into the already-placed exhaust pipe; performing, on the outside of the building, an operation of fixing the inserted exhaust tube to the exhaust pipe; and performing, on the inside of the building, an operation of connecting the fixed exhaust tube to an exhaust vent of a combustion apparatus.

Abstract: A cutting guide serves to adjust a length of an exhaust tube introduced in an exhaust pipe so as to adapt to combination of the exhaust pipe communicating from the inside to the outside of a building with an exhaust terminal attached to an end portion of the exhaust pipe on an outdoor side. The cutting guide has a reference site for alignment with an exhaust pipe portion including the exhaust pipe, and has an indication of a cutting position of the exhaust tube for adjusting a length of the exhaust tube protruding from the end portion of the exhaust pipe portion on the outdoor side to a length adapted to a type of the exhaust terminal.

Abstract: A method of installing an exhaust tube is implemented by inserting an exhaust tube into an exhaust pipe that leads from inside of a building to outside thereof. A support portion of an insertion jig is introduced into a through hole from a side of one end portion of the exhaust tube, and a projection of the support portion is engaged with a recess of the exhaust tube, so that the insertion jig is fixed to the exhaust tube. An end of the exhaust tube on the side of the one end portion having the insertion jig fixed thereto is inserted into the exhaust pipe, and the exhaust tube is pushed from inside of the building to outside thereof.