====India Mark ll pump====
The India Mark II Pump is a robust conventional lever action handpump and is subject to Indian Standard IS 9301.. It is designed for heavy-duty use, serving communities of 300 persons. The maximum recommended lift is 50 m. The India Mark II is a public domain pump defined by Indian Standards and RWSN specifications. This pump has a pump head, pump stand and a handle of galvanised steel. The down hole components exist of a brass lined cast iron cylinder with a footvalve and a plunger of brass. The plunger has a double nitrile rubber cup seal, the rising main is a Ø32 mm GI pipe and the pump rods are of galvanised steel with threaded connectors. This pump is not corrosion resistant and should not be used in areas with aggressive water ( pH value < 6.5).
It requires special skills for installation as well as for the maintenance, therefore it is not considered to be a VLOM pump. The pump body parts are Hot-Dip Galvanized and as such are extremely durable over the years.
==Suitable conditions==
{|border="1" cellspacing="0"
|-
! scope="col" |India Mark ll
! scope="col" |India Mark ll, extra deep
! scope="col" |India Mark lll
|-
{|border="1" cellpadding="5"
|-
|borehole
|}
|-
{|border="1" cellpadding="5"
|-
|Cylinder diameter (mm):
|63.5
|-
|Maximum Stroke (mm):
|125
|-
|Approx. discharge at 75 watt input m3/h:
|at 10 m head 1.8<br>
at 15 m head 1.3<br>
at 20 m head 1.0<br>
at 25 m head 0.9<br>
at 30 m head 0.8
|-
|Pumping lift (m):
|10 – 50
|-
|Population served (nos.):
|300
|-
|Households (nos.):
|30
|-
|Water consumption (lpcd):
|15 – 20
|-
|Type of well:
|borehole
|}
|}
==Construction, operations and maintenance==
[[Image:India Mark ll tools.jpg|thumb|right|250px|The India Mark ll pump toolkit. Photo: [http://www.clean-water-for-laymen.com/water-hand-pumps.html A Layman's Guide to Clean Water.]]]
====India Mark ll====
The Mark II is a closed-cylinder pump. The cylinder down hole components exist of a brass-lined cast iron cylinder with the foot valve a footvalve and piston assemblies made a plunger of brass. The piston seals are plunger has a double nitrile rubber cup sealsseal, the rising main is a Ø32 mm GI pipe and the pump rods are of galvanised steel with threaded connectors. The top and bottom of the piston cylinder are “capped” with threaded reducers. The diameter of the pump cylinder is larger than the diameter of the riser main to which it is attached.
Maintenance on any part of the pump cylinder requires that the riser main and the pump rod be removed from the ground.The pump rod is galvanized steel and sections are threaded together. The pump cylinder is threaded onto the last section of riser main and is removed in its entirety as the last component to come out of the ground. The pump cylinder can then be unscrewed from the riser main. The top and bottom caps can be unscrewed from the cylinder body to gain access to the foot valve, the piston valve, the piston seals and anything else inside the cylinder body.
