PB관 연결 및 보일러 분배기 교체

- 에어 빼기

- http://blog.naver.com/PostView.nhn?blogId=jojh3960&logNo=221134597484

- https://blog.naver.com/dhkek2000/221176956263

- https://blog.naver.com/feel-care/221171501535

- 엑셀 나비밸브 : http://www.gmarket.co.kr/challenge/neo_affiliate/daum/daum_redirect.asp?target=http://www.gmarket.co.kr/challenge/neo_jaehu/jaehu_goods_gate.asp?goodscode=522293967&GoodsSale=Y&jaehuid=200002243&vkey=RLHIS0HZX24SKUXZ3933LKVUU4XMJ4