ensure maintenance is carried out by a competent person (someone who has the necessary skills, knowledge and experience to carry out the work safely) 1  maintain plant and equipment regularly â use the manufacturerâs maintenance instructions as a guide, particularly if there are safety-critical features.
HDPE (High Density Polyethylene). 3/4 HDPE will cost about $45.00 for 100' ($0.45/ft), so depending on the amount required can be much cheaper than the previous options. HDPE is used by many municipalities as water supply lines, so it has been tried and tested in underground applications.
Suggested budget (to the IDs only excluding accessories) for resale HDB with full renovation (hacking, flooring, false ceiling, carpentry, doors, windows and grilles). 3 room HDB: $30,000 and up. 4 room HDB: $40,000 and up. Giving the IDs something to work with: for example you gave your ID a budget of $15,000 and expect him to do a âmiracleâ full renovation for your 4 room resale HDB flat. 2  He will most likely reject your project without even trying because he know its totally impossible.